crop-chem-docs/corpus/epa_ppls/264-1099.md

# RIMFIRE MAX HERBICIDE

- EPA Reg No: **264-1099**
- Registrant: BAYER CROPSCIENCE, LLC
- Signal word: Warning
- Active ingredients: Mesosulfuron-methyl (1.91%); Propoxycarbazone-sodium (4.76%)
- Label accepted: 2025-03-15
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000264-01099-20250315.pdf

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March 15, 2025
SENT BY EMAIL
Gaganpreet.kaur@bayer.com
gaganpreet.kaur@bayer.com
BAYER CROPSCIENCE LP
Subject: Labeling Notification per Pesticide Registration Notice (PRN) 98-10 - Add reference
statements to label.
Product Name: RIMFIRE MAX HERBICIDE
Admin Number: 264-1099
EPA Receipt Date: 12/19/2024
Action Case Number: 00640114
Dear Gaganpreet.kaur@bayer.com:
The U.S. Environmental Protection Agency is in receipt of your application for notification under Pesticide
Registration Notice 98-10 for the above referenced product. The EPA has conducted a review of this request
for its applicability under PRN 98-10 and finds that the action requested falls within the scope of PRN 98-10.
The labeling submitted with this application has been stamped "Notification" and will be placed in our records.
Should you wish to add/retain a reference to your company’s website on your label, then please be aware that
the website becomes labeling under the Federal Insecticide, Fungicide, and Rodenticide Act and is subject to
review by the EPA. If the website is false or misleading, the product will be considered to be misbranded and
sale or distribution of the product is unlawful under FIFRA section 12(a)(1)(E). 40 CFR § 156.10(a)(5) lists
examples of statements the EPA may consider false or misleading. In addition, regardless of whether a
website is referenced on your product’s label, claims made on the website may not substantially differ from
those claims approved through the registration process. Therefore, should the EPA find or if it is brought to
our attention that a website contains statements or claims substantially differing from statements or claims
made in connection with obtaining a FIFRA section 3 registration, the website will be referred to the EPA’s
Office of Enforcement and Compliance Assurance.
 If you have questions, please contact Bewanda Alexander via email at alexander.bewanda@epa.gov.
Sincerely,
Kable Bo Davis, Senior Advisor 
FHB, RD
Office of Pesticide Programs
Kable Bo Davis

1
RIMFIRE® Max Herbicide 
For post-emergence control of certain grasses and broadleaf weeds in winter and spring wheat 
(including durum).
ACTIVE INGREDIENTS:
Propoxycarbazone-sodium (CAS No. 181274-15-7)............................................................................................................................4.76%
Mesosulfuron-Methyl (CAS No. 208465-21-8) .....................................................................................................................................1.91%
INERT INGREDIENTS ......................................................................................................................................................................93.33%
TOTAL: 100.0%
Contains petroleum distillates.
This product is a water dispersible granule containing 4.76% Propoxycarbazone-sodium and 1.91% Mesosulfuron-methyl , by weight
EPA Reg. No. 264-1099 EPA Est. 
STOP - Read the label before use
Keep out of reach of children
WARNING AVISO
Si usted no entiende la etiqueta, busque a alguien para que se la explique a usted en detalle.
(If you do not understand the label, find someone to explain it to you in detail.)
For MEDICAL And TRANSPORTATION Emergencies ONLY Call 24 Hours A Day 1-800-334-7577
For PRODUCT USE Information, Call 1-866-99BAYER (1-866-992-2937)
Please refer to [back panel] [booklet] for additional precautionary statements and directions for use.
[Note to reviewer: Location of additional precautionary statements and directions for use will vary between 
those listed, depending on container type/size.]
FIRST AID
IF IN EYES:  Hold eye open and rinse slowly and gently with water for 15-20 minutes.
 Remove contact lenses, if present, after the first 5 minutes, then continue rinsing.
 Call a poison control center or doctor for treatment advice.
IF ON SKIN OR 
CLOTHING:
 Take off contaminated clothing.
 Rinse skin immediately with plenty of water for 15-20 minutes.
 Call a poison control center or doctor for treatment advice.
IF INHALED:  Move person to fresh air
 If person is not breathing, call 911 or an ambulance, then give artificial respiration, preferably by mouth-
to-mouth, if possible.
 Call a poison control center or doctor for further treatment advice.
IF SWALLOWED:  Immediately call a poison control center or doctor for treatment advice.
 Do not induce vomiting unless told to do so by a poison control center or doctor.
 Do not give any liquid to the person
 Do not give anything by mouth to an unconscious person.
For MEDICAL Emergencies Call 24 Hours A Day 1-800-334-7577.
Have the product container or label with you when calling a poison control center or doctor or going for treatment.
NOTE TO PHYSICIAN: Contains petroleum distillate. Vomiting may cause aspiration pneumonia. 
GROUP 2 HERBICIDE
264-1099
03/15/2025

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PRECAUTIONARY STATEMENTS
WARNING 
HAZARD TO HUMANS AND DOMESTIC ANIMALS
Causes substantial but temporary eye injury. Harmful if absorbed through skin, inhaled, or swallowed. Avoid contact with skin, eyes, or 
clothing. Do not get in eyes or on clothing. Avoid breathing dust. Wear protective eyewear (goggles, face shield, or safety glasses). 
Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco, or using the toilet. 
PERSONAL PROTECTIVE EQUIPMENT (PPE)
Applicators and other handlers must wear: Long-sleeved shirt and long pants, socks, shoes, and protective eyewear (goggles, face 
shield, or safety glasses). Follow the manufacturer’s instructions for cleaning/maintaining PPE. If no such instructions for washables, 
use detergent and hot water. Keep and wash PPE separately from other laundry. 
ENGINEERING CONTROL STATEMENT
When handlers use closed systems, enclosed cabs or aircraft in a manner that meets the requirements listed in the Worker Protection 
Standard (WPS) for agricultural pesticides [40 CFR 170.607 (d), (e), and (f)], the handler PPE requirements may be reduced or 
modified as specified in the WPS. 
USER SAFETY RECOMMENDATIONS
User should:
 Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, or using tobacco.
 Remove clothing/ PPE immediately if pesticide gets inside. Then wash thoroughly and put on clean clothing.
 Remove PPE immediately after handling this product. Wash the outside of gloves before removing. As soon as possible, wash 
thoroughly and change into clean clothing.
ENVIRONMENTAL HAZARDS
This pesticide is toxic to fish and aquatic invertebrates. Do not apply directly to water, or to areas where surface water is present or to 
intertidal areas below the mean high water mark. Do not contaminate any body of water and do not apply when/where conditions could 
favor runoff. Do not contaminate water by cleaning of equipment or disposal of equipment washwaters or rinsate. Do not allow sprays to 
drift onto desirable plants. Drift or runoff may adversely affect non-target plants.
This chemical has properties and characteristics associated with chemicals detected in groundwater. This chemical may leach into 
groundwater if used in areas where soils are permeable, particularly where the water table is shallow.
This product may impact surface water quality due to runoff of rain water. This is especially true for poorly draining soils and soils with 
shallow ground water. This product is classified as having high potential for reaching surface water via runoff for weeks after 
application. A level, well-maintained vegetative buffer strip between areas to which this product is applied and surface water features 
such as ponds, streams, and springs will reduce the potential loading of this product from runoff water and sediment. Runoff of this 
product will be greatly reduced by avoiding applications when rainfall or irrigation is expected to occur within 48 hours.

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DIRECTIONS FOR USE
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
Do not use this product until you have read the entire label.
Do not apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers 
may be in the area during application. 
For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation.
AGRICULTURAL USE REQUIREMENTS
Use this product only in accordance with its labeling and with the Worker Protection Standard, 40 CFR part 170. This Standard contains 
requirements for the protection of agricultural workers on farms, forests, nurseries, and greenhouses, and handlers of agricultural 
pesticides. It contains requirements for training, decontamination, notification, and emergency assistance. It also contains specific 
instructions and exceptions pertaining to the statements on this label about personal protective equipment (PPE), and restricted-entry 
interval. The requirements in this box only apply to uses of this product that are covered by the Worker Protection Standard.
Do not enter or allow worker entry into treated areas during the restricted entry interval (REI) of 12 hours. 
PPE required for early entry to treated areas that is permitted under the Worker Protection Standard and that involves contact with 
anything that has been treated such as plants, soil or water, is coveralls, socks, shoes, waterproof gloves, and protective eye wear.
STORAGE AND DISPOSAL
Do not contaminate water, food, or feed by storage and disposal.
PESTICIDE STORAGE
Store in a cool, dry place.
PESTICIDE DISPOSAL
Wastes resulting from the use of this product may be disposed of on site or at an approved waste disposal facility.
CONTAINER HANDLING
Non-refillable container. Do not reuse or refill this container. Offer for recycling, if available. Offer for reconditioning, if appropriate. Triple 
rinse container (or equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining contents into application 
equipment or a mix tank. Fill the container 1/4 full with water and recap. Shake for 10 seconds. Pour rinsate into application equipment 
or a mix tank or store rinsate for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two 
more times. Puncture and dispose of in a sanitary landfill, or by incineration; or, if allowed by State and local authorities, by burning. If 
burned, stay out of smoke.
PRODUCT INFORMATION
RIMFIRE® Max Herbicide is intended for application as a foliar spray in winter and spring wheat (including durum) for control of annual 
grasses and broadleaf weeds.
ENVIRONMENTAL AND BIOLOGICAL ACTIVITY
RIMFIRE Max Herbicide is absorbed by foliage and roots of weeds and offers contact and residual weed control. RIMFIRE Max 
Herbicide provides the most consistent control when applied to actively growing weeds. RIMFIRE Max Herbicide is active against many 
important grass and broadleaf weeds (see list below for details). Environmental conditions, which support vigorous growth of crop and 
weeds, also result in highest herbicidal activity. Following application, symptoms of herbicidal activity may develop within several days. 
Speed of herbicide action depends on environmental conditions and increases with increasing temperature and moisture. Sensitive 
weeds quickly stop growing and no longer compete with the crop. Visible signs of activity include cessation of elongation, yellowing 
and/or reddening of weeds, and finally plant death.
Abnormal environmental conditions (excess soil moisture or drought, extreme cold weather) can influence crop tolerance and herbicidal 
activity and may cause temporary response of the crop or reduced levels of weed control. This may result in weed stunting, rather than 
weed death. However, weed competition will be greatly reduced, and should permit normal crop development. Crop response may 
occur when frost occurs shortly after an application of RIMFIRE Max Herbicide to actively growing wheat.
CROPS
RIMFIRE Max Herbicide may be used on winter and spring wheat, including durum.

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SURFACTANTS
RIMFIRE Max Herbicide is a water dispersible granule that does not include an adjuvant. A recommended adjuvant must be tankmixed 
with RIMFIRE Max Herbicide according to the guidelines as described in the MIXING INSTRUCTIONS section.
RIMFIRE Max Herbicide offers the flexibility to choose between three distinct adjuvant systems including 1) methylated seed oil or 2) 
“basic blend” type adjuvant, 3) non-ionic surfactant plus ammonium nitrogen fertilizer. A methylated seed oil, basic blend adjuvant or a 
non-ionic surfactant (NIS) plus ammonium nitrogen fertilizer must be tankmixed with RIMFIRE Max Herbicide. 
Do not use additives that alter the spray solution below 6.0 pH. Best results are obtained at spray solution pH of 6.0 – 8.0.
Organosilicone-based surfactants or crop oil concentrate surfactants are not recommended for use with RIMFIRE Max Herbicide.
1) Methylated Seed Oil (MSO)
A methylated seed oil offers the most robust adjuvancy with RIMFIRE Max Herbicide. Select a high quality methylated seed oil 
containing at least 80% methylated seed oil and 10% emulsifier or greater. Use 1.3 – 1.5 pt MSO/acre in tankmixture with RIMFIRE 
Max Herbicide. The potential for crop response may be increased with the use of MSO compared to non-ionic surfactant plus 
ammonium nitrogen fertilizer. 
When a methylated seed oil is used, ammonium nitrogen or ammonium sulfate fertilizers are not recommended. 
2) Basic Blend Adjuvants
A basic blend adjuvant is a formulated combination of a non-ionic surfactant or methylated seed oil and a nitrogen source. Apply a 
basic blend adjuvant at 1 - 1.25 % v/v in tank mixture with RIMFIRE Max Herbicide. Select the appropriate amount of basic blend 
adjuvant per acre depending on local conditions but do not apply less basic blend adjuvant than 0.8 pt/acre.
When a basic blend adjuvant is used, ammonium nitrogen or ammonium sulfate fertilizers are not recommended.
3) Non-ionic Surfactant (NIS) + Ammonium Nitrogen Fertilizer (in water carrier solutions)
Use a non-ionic surfactant at a concentration of 0.25 - 0.5% v/v (1-2 qt per 100 gallons of spray solution) with ammonium nitrogen 
fertilizer. At least 80% of the surfactant product must be active non-ionic surfactant. Avoid products that do not accurately define their 
ingredients. Use a spray grade quality urea ammonium nitrogen fertilizer (28-0-0 or 30-0-0 or 32-0-0 at 1 – 2 qt/acre) or ammonium 
sulfate fertilizer (21-0-0-24 at 1.5 – 3 lbs/acre). 
APPLICATION INFORMATION
RIMFIRE Max Herbicide should be applied to actively growing wheat in the spring.
RIMFIRE Max Herbicide provides consistent performance when applied with water as the spray carrier and the appropriate additive is 
added to the spray solution. Properly calibrated ground or aerial (fixed wing or helicopter) application equipment may be used to apply 
RIMFIRE Max Herbicide postemergence as a foliar spray. Weed infestations should be treated before they become competitive with the 
crop.
Thorough coverage of weeds is necessary to obtain good weed control. The use of nozzles and spray pressure that deliver coarse or 
coarser spray droplets as indicated in the nozzle manufacturer’s catalogs and in accordance with ASABE Standard S-572.1 are highly 
recommended for optimum spray coverage and canopy penetration.
Select spray nozzles that provide best spray distribution and weed coverage at the appropriate spray pressure. Avoid uneven spray 
distribution, skips, overlaps, and spray drift.
Do not apply RIMFIRE Max Herbicide through any type of irrigation system.
Apply 3 ounces/acre of RIMFIRE Max Herbicide to wheat from emergence (fully expanded first true leaf) up to flag leaf emergence. Do 
not apply more than a total of 3 ounces/acre of RIMFIRE Max Herbicide per season.
GROUND APPLICATION
RIMFIRE Max Herbicide can be applied broadcast in 10 or more gallons of water per acre. For weed control in dense weed canopies, 
use 15 or more gallons of water per acre. Weed infestations should be treated before they become competitive with the crop.
The use of 80-degree or 110-degree flat-fan nozzles is highly recommended for optimum spray coverage and canopy penetration. To 
get uniform spray coverage, use nozzles and pressure that deliver coarse or coarser spray droplets as indicated in nozzle 
manufacturer’s catalogs and in accordance with ASABE standard S-572.1. Use screens that are 50 mesh or larger. 
Ground speed for application should not exceed 10 mph.

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AERIAL APPLICATION
Calibrate the spray equipment prior to use. RIMFIRE Max Herbicide should be applied in a minimum of 5 gallons of water per broadcast 
acre. Weed infestations should be treated before they become competitive with the crop.
To get uniform spray coverage, use nozzles and pressure that deliver coarse or coarser spray droplets as indicated in nozzle 
manufacturer’s catalogs and in accordance with ASABE standard S-572.1. DO NOT use raindrop nozzles.
Aerial applications with this product should be made at a maximum height of 10 feet above the crop with low drift nozzles. Avoid 
application under conditions where uniform coverage cannot be obtained or where excessive spray drift may occur.
Flagmen and loaders should avoid inhalation of spray mist and prolonged contact with skin.
See the Spray Drift Management section of this label for additional information on proper application of RIMFIRE Max Herbicide. 
MIXING INSTRUCTIONS
RIMFIRE Max Herbicide must be applied with clean and properly calibrated equipment. Prior to adding RIMFIRE Max Herbicide to the 
spray tank, ensure that the spray tank, filters and nozzles have been thoroughly cleaned. In-line strainers and nozzle screens should be 
50 mesh or coarser.
1. Fill the spray tank 1/4 to 1/2 full with clean water and begin agitation or bypass.
2. Add the appropriate rate of RIMFIRE Max Herbicide, as determined under “Recommended Rates,” directly to the spray tank. 
Maintain sufficient agitation during both mixing and application.
3. Add a recommended broadleaf weed herbicide, if desired.
4. Add the surfactant.
5. Fill the spray tank with balance of water needed.
6 Continue agitation during RIMFIRE Max Herbicide application to ensure uniform spray coverage. If the mixture is not continuously 
agitated, settling may occur. Use spray solution within 24 hours after mixing.
RE-SUSPENDING WDG PRODUCTS IN SPRAY SOLUTION
Like other Water Dispersible Granules or suspension concentrates (SC’s), RIMFIRE Max Herbicide may settle if left standing without 
agitation. If the spray solution is allowed to settle for one hour or more, re-agitate the spray solution for a minimum of 15 minutes before 
application. 
COMPATIBILITY
If RIMFIRE Max Herbicide is to be tank mixed with other herbicides, compatibility should be tested prior to mixing. To test for 
compatibility, use a small container and mix a small amount (0.5 to 1 quart) of spray solution, combining all ingredients in the same ratio 
as the anticipated use. If any indications of physical incompatibility develop, do not use this mixture for spraying. Indications of 
incompatibility usually occur within 5-15 minutes after mixing. Indications of incompatibility include separation in the mix and either 
clumping or clabbering of the mixture. Read and follow the label of each tank mix product used for precautionary statements, directions 
for use, geographic and other restrictions.
WEED RESISTANCE MANAGEMENT
For resistance management, Rimfire Max Herbicide is a Group 2 herbicide. Any weed population may contain or develop plants 
naturally resistant to Rimfire Max Herbicide and other Group 2 herbicides. The resistant biotypes may dominate the weed population if 
these herbicides are used repeatedly in the same field. Appropriate resistance management strategies should be followed. 
To delay herbicide resistance take one or more of the following steps: 
 Rotate the use of Rimfire Max or other Group 2 herbicides within a growing season sequence or among growing seasons with 
different herbicide groups that control the same weeds in a field. 
 Use tank mixtures with herbicides from a different group if such use is permitted; where information on resistance in target 
weed species is available, use the less resistance-prone partner at a rate that will control the target weed(s) equally as well as 
the more resistance-prone partner. Consult your local extension service or certified crop advisor if you are unsure as to which 
active ingredient is currently less prone to resistance. 
 Adopt an integrated weed-management program for herbicide use that includes scouting and uses historical information 
related to herbicide use and crop rotation, and that considers tillage ( or other mechanical control methods), cultural ( e.g., 
higher crop seeding rates; precision fertilizer application method and timing to favor the crop and not the weeds), biological 
(weed-competitive crops or varieties) and other management practices. 
 Scout after herbicide application to monitor weed populations for early signs of resistance development. Indicators of possible 
herbicide resistance include: (1) failure to control a weed species normally controlled by the herbicide at the dose applied, 
especially if control is achieved on adjacent weeds; (2) a spreading patch of non-controlled plants of a particular weed species; 
(3) surviving plants mixed with controlled individuals of the same species. If resistance is suspected, prevent weed seed 
production in the affected area by an alternative herbicide from a different group or by a mechanical method such as hoeing or 
tillage. Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment when moving 
between fields, and planting clean seed.

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 If a weed pest population continues to progress after treatment with this product, discontinue use of this product, and switch to 
another management strategy or herbicide with a different mode of action, if available. 
 Contact your local extension specialist or certified crop advisors for additional pesticide resistance-management and/or 
integrated weed-management recommendations for specific crops and weed biotypes. 
 For further information or to report suspected resistance contact Bayer CropScience at 1-866-99BAYER (1-866-992-2937). 
You can also contact your pesticide distributor or university extension specialist to report resistance.
WEEDS CONTROLLED
RIMFIRE Max Herbicide effectively controls the following weeds1 when applied at the rates and application timings shown and weeds 
are actively growing. Best control is achieved when grass weeds are treated at the 1-leaf to 2-tiller stage of growth and before broadleaf 
weeds are larger than 2 inches in height.
GRASS WEED RECOMMENDATIONS BROADLEAF WEED RECOMMENDATIONS
Cheat (True cheat)* Bromus secalinus C Blue mustard Chorispora tenella C
Barnyardgrass* Echinochloa crus-galli C Black mustard Brassica nigra C
Downy brome Bromus tectorum PC Catchweed bedstraw Galium aparine PC
Foxtail barley* Hordeum jubatum C Canola (volunteer) Brassica napus C
Green foxtail* Setaria viridis C Common chickweed Stellaria media PC
Japanese brome* Bromus japonicus C Cornflower / Bachelor’s Button Centaurea cyanus PC
Little barley Hordeum pusillum PC Dogfennel Eupatorium capillifolium PC
Persian darnel* Lolium persicum PC Field pennycress Thlaspi arvense PC
Quackgrass Agropyron repens PC Henbit Lamium amplexicaule PC
Smooth brome Bromus inermis PC Ivyleaf speedwell Veronica hederaefolia PC
Wild oat Avena fatua C London rocket Sisymbrium irio C
Yellow Foxtail* Setaria pumila C
Mouseear chickweed Cerastium vulgatum PC
Red clover Trifolium pratense PC
Redroot pigweed1 Amaranthus retroflexus PC
Shepherd’s purse Capsella bursa-pastoris PC
Swinecress Coronopus didymus PC
Tansy mustard Descurania pinnata C
Tumble mustard Sisymbrium altissimum C
Wild beet Beta vulgaris C
Wild mustard Sinapis arvensis C
Wild radish Raphanus raphanistrum C
Wild turnip Brassica rapa C
C means Control. PC means Partial Control. Partially controlled weeds will be stunted in growth and/or be reduced in number as 
compared to non-treated areas but performance will not be commercially acceptable. 
*These weeds will be controlled when RIMFIRE Max Herbicide is applied at the pre-tiller stage of weed growth.
1 Naturally occurring resistant biotypes of weeds are known to occur. Refer to the WEED RESISTANCE section for additional 
information regarding management tactics for resistant weeds.
USE RATES
Unless otherwise recommended by Bayer CropScience, do not use less than 3 oz per acre of RIMFIRE Max Herbicide.
Apply RIMFIRE Max Herbicide at 3 ounces/acre to wheat in spring as a single application to actively growing weeds. Do not exceed a 
product application rate of 3 ounces/acre in a single application in the spring.
TANKMIXES
For broad-spectrum control of both annual grasses and broadleaf weeds, RIMFIRE Max Herbicide may be mixed with broadleaf 
herbicides and a non-ionic surfactant. RIMFIRE Max Herbicide contains 0.144 pounds of mefenpyr-diethyl per pound of product.

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Applying the maximum-labeled rate of RIMFIRE Max Herbicide delivers 0.027 lbs of mefenpyr-diethyl per acre. Do not apply more than 
0.053 pounds of mefenpyr-diethyl per acre per year. With all tank-mix partners, read and follow use directions, rates, precautions, 
timing, recropping restrictions, grazing interval restrictions and recommendations on the broadleaf herbicide and surfactant labels.
Possible tank-mix partners include:
AFFINITY TANKMIX™ 1 HARMONY EXTRA XP®
AFFINITY BROADSPEC™ 1 HUSKIE™
ALLY® MCP Ester 3
ALLY EXTRA® OLYMPUS™ 4
BRONATE ADVANCED™ * 2 STARANE® , STARANE NXT , Starane Ultra5
BUCTRIL® * STINGER® 
EXPRESS® WIDEMATCH™6
HARMONY®
* Equivalent bromoxynil products may be substituted in a tankmix for these products.
1 Up to 0.6 oz/A of Affinity Tankmix or up to 0.4 oz/A Affinity Broadspec is recommended for use in combination with RIMFIRE Max 
Herbicide.
2 Do not exceed 0.8 pt/A of Bronate Advanced in combination with RIMFIRE Max Herbicide.
3 MCP Ester may be added as broadleaf tank mix partner with RIMFIRE Max Herbicide at no more than 0.25 lb ai/A. 
4 Refer to Olympus label concerning rate and crop rotation recommendations. 3 oz of RIMFIRE Max contains 0.0088 lb 
propoxycarbazone-sodium active ingredient. Do not apply more than 0.0525 lb propoxycarbazone-sodium active ingredient per acre per 
crop year. This limit includes all products, which contain propoxycarbazone-sodium used on the same acre.
5 0.3 pt/A of Starane or up to 14 oz of Starane NXT or 2.8 oz Starane Ultra may be used in combination with RIMFIRE Max Herbicide.
6 Up to 1.0 pt/A of WideMatch may be used in combination with RIMFIRE Max Herbicide.
TANK MIXTURES FOR DISEASE CONTROL
RIMFIRE Max Herbicide may be applied in combination with Stratego®, Tilt®, Headline, or Topsin® M 70WP fungicides for weed and 
disease control. Do not apply RIMFIRE Max Herbicide in tank mixture with tebuconazole.
When a fungicide and broadleaf herbicide are added in tankmixture to RIMFIRE Max Herbicide, grass control may be delayed or 
reduced. Refer to the specific fungicide label for use directions, application rates, restrictions and a list of diseases controlled.
TANK MIXTURES FOR INSECT CONTROL
RIMFIRE Max Herbicide may be applied with Baythroid® XL, Sevin® XLR Plus, Warrior® Insecticide with Zeon Technology, or Mustang 
Max insecticides. Refer to the specific insecticide label for use directions, application rates, restrictions and a list of insects controlled.
TANK MIX PRECAUTIONS
Always follow the label instructions of the tankmix partner as well as RIMFIRE Max Herbicide . Check the compatibility of RIMFIRE Max 
Herbicide and the tankmix partner by mixing all components in the order specified in the Mixing Instructions section, including 
adjuvants and water, into a small separate container in order to evaluate compatibility prior to adding them to the tank.
TANK CLEANUP PROCEDURE 
1. Drain the tank completely, and then wash out tank, boom and hoses with clean water. Drain again.
2. Half fill the tank with clean water and add ammonia (i.e., 3% domestic ammonia solution) at a dilution rate of 1% (i.e., 1 gallon of 
domestic ammonia for every 100 gallons of rinsate). Complete filling of the tank with water. Agitate/recirculate and flush through 
boom and hoses. Leave agitation on for 10 minutes. Drain tank completely.
3. Repeat step 2.
4. Remove nozzles and screens and soak them in a 1% ammonia solution. Inspect nozzles and screens and remove visible residues.
5. Flush tank, boom, and hoses with clean water.
6. Inspect tank for visible residues. If present, repeat step 2.

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CROP ROTATION RESTRICTIONS
To ensure safety of rotational crops, the following rotational intervals must be followed:
North Dakota & Minnesota, Montana & South Dakota
Crop Rotation Interval
(Months)
Wheat 0
Millet 4
Alfalfa 10
Barley 10
Canola 10
Corn-conventional 10
Dry Beans 10
Flax 10
Lentils 10
Peas 10
Safflower 10
Soybeans 10
Sugar Beets 10
Sunflowers 10
Washington, Oregon & Idaho
Crop Rotation Interval
(Months)
Wheat 0
Millet 4
Alfalfa 10
Barley 10
Canola 12
Dry Beans 10
Lentils 10
Peas 10
Corn – Conventional 18
 In areas where a crop is not specified, conduct a field bioassay as described in the FIELD BIOASSAY section of this label. 
 In all areas, 24 inches of precipitation and a 12-month rotation interval are required for potatoes, buckwheat, and onions.
Rotational crops should not be planted on clay or eroded knolls or hillsides following a RIMFIRE Max Herbicide application without 
conducting a field bioassay.
FIELD BIOASSAY
A field bioassay must be conducted for crops not listed on this label and for crops listed on the label for which a shorter plant-back 
interval than listed is desired. 
To conduct a field bioassay, plant strips of the crop you want to grow the season following RIMFIRE Max Herbicide application. Monitor 
the crop for response to RIMFIRE Max Herbicide to determine if the crop can be grown safely in previously treated RIMFIRE Max 
Herbicide areas.
Regardless of the bioassay results, do not plant any crop, except fall-sown or winter wheat, closer than 4 months after a RIMFIRE Max 
Herbicide application.

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MANDATORY SPRAY DRIFT MANAGEMENT
Aerial Applications:
 When applying aerially to crops, do not release spray at a height greater than 10 ft above the crop canopy, unless a greater 
application height is necessary for pilot safety.
 Applicators are required to use a coarse or coarser droplet size (ASABE S572.1).
 When applying to crops via aerial application equipment, the spray boom must be mounted on the aircraft so as to minimize 
drift caused by wing tip or rotor blade vortices. The boom length must not exceed 65% of the wingspan of airplanes or 75% of 
the rotor blade diameter of helicopters.
 When applying to crops via aerial application equipment, applicators must use ½ swath displacement upwind at the downwind 
edge of the field.
 Nozzles must be oriented so the spray is directed toward the back of the aircraft.
 Do not apply when wind speeds exceed 10 miles per hour at the application site.
 Do not apply during temperature inversions.
Ground Boom Applications:
 When using ground application equipment, apply with nozzle height no more than 3 feet above the ground or crop canopy.
 Applicators are required to use a coarse or coarser droplet size (ASABE S572.1). 
 Do not apply when wind speeds exceed 10 miles per hour at the application site.
 Do not apply during temperature inversions.
SPRAY DRIFT ADVISORIES
THE APPLICATOR IS RESPONSIBLE FOR AVOIDING OFF-SITE SPRAY DRIFT. 
BE AWARE OF NEARBY NON-TARGET SITES AND ENVIRONMENTAL CONDITIONS.
IMPORTANCE OF DROPLET SIZE
The most effective way to reduce drift potential is to apply large droplets. Use the largest droplets that provide target pest control. 
While applying larger droplets will reduce spray drift, the potential for drift will be greater if applications are made improperly or under 
unfavorable environmental conditions.
Controlling Droplet Size – Ground Boom 
 Volume – Increasing the spray volume so that larger droplets are produced will reduce spray drift. Use the highest practical 
spray volume for the application. If a greater spray volume is needed, consider using a nozzle with higher flow rate. 
 Pressure – Use the lowest spray pressure recommended for the nozzle to produce the target spray volume and droplet size. 
 Spray Nozzle – Use a spray nozzle that is designed for the intended application. Consider using nozzles designed to reduce 
drift. 
Controlling Droplet Size – Aircraft 
Adjust Nozzles – Follow nozzle manufacturers recommendations for setting up nozzles. Generally, to reduce fine droplets, nozzles 
should be oriented parallel with the airflow in flight.
BOOM HEIGHT
Setting the boom at the lowest referenced height (if specified) which provides uniform coverage reduces the exposure of
droplets to evaporation and wind. For ground equipment, the boom should remain level with the crop and have minimal bounce.
RELEASE HEIGHT Aircraft 
Higher release heights increase the potential for spray drift. When applying aerially to crops, do not release spray at a height greater 
than 10 ft above the crop canopy, unless a greater application height is necessary for pilot safety.
WIND
Drift potential increases with wind speed. AVOID APPLICATIONS DURING GUSTY WIND CONDITIONS. Applicators need to be 
familiar with local wind patterns and terrain that could affect spray drift.
TEMPERATURE AND HUMIDITY
When making applications in hot and dry conditions, use larger droplets to reduce effects of evaporation.
TEMPERATURE INVERSIONS
Drift potential is high during a temperature inversion. Temperature inversions are characterized by increasing temperature with altitude 
and are common on nights with limited cloud cover and light to no wind. The presence of an inversion can be indicated by ground fog 
or by the movement of smoke from a ground source or an aircraft smoke generator. Smoke that layers and moves laterally in a

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concentrated cloud (under low wind conditions) indicates an inversion, while smoke that moves upward and rapidly dissipates indicates 
good vertical air mixing. Avoid applications during temperature inversions. 
SHIELDED SPRAYERS
Shielding the boom or individual nozzles can reduce spray drift. Consider using shielded sprayers. Verify that the shields are not 
interfering with the uniform deposition of the spray on the target area.
NON-TARGET ORGANISM ADVISORY STATEMENT
This product is toxic to plants and may adversely impact the forage and habitat of non-target organisms, including pollinators, including 
the monarch butterfly (and its larvae), birds, or bats, in areas adjacent to the treated area. Protect the forage and habitat of non-target 
organisms by minimizing spray drift. For further guidance and instructions on how to minimize spray drift, refer to the Mandatory Spray 
Drift Management and Spray Drift Advisories sections of this label.
RUNOFF PREVENTION
To protect the environment, do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters or surface
waters. Applying this product in calm weather when rain is not predicted for the next 24 hours will help to ensure that wind or rain does 
not blow or wash pesticide off the treatment area. Rinsing application equipment over the treated area will help avoid run off to water 
bodies or drainage systems.
WINDBLOWN SOIL PARTICLES
RIMFIRE Max Herbicide has the potential to move off-site due to wind erosion. Soils that are subject to wind erosion usually have a 
high silt and/or fine to very fine sand fractions and low organic matter content. Other factors which can affect the movement of 
windblown soil include the intensity and direction of prevailing winds, vegetative cover, site slope, rainfall, and drainage patterns. Avoid 
applying RIMFIRE Max Herbicide if prevailing local conditions may be expected to result in off-site movement. 
Leave treated soil undisturbed to reduce the potential for RIMFIRE Max Herbicide movement by soil erosion due to wind or
water. 
Before applying RIMFIRE Max Herbicide the user must read and understand all label directions, precautions and restrictions 
completely, including these requirements for a site specific evaluation. If you do not understand any of the instructions or
precautions on the label, or are unable to make a site specific evaluation yourself, consult your local agricultural dealer,
cooperative extension service, land managers, professional consultants, or other qualified authorities familiar with the area to be 
treated. If you still have questions regarding the need for site specific considerations, please call Bayer CropScience at 1-866-
99BAYER (1-866-992-2937).
ENDANGERED SPECIES
To avoid adverse effects on endangered plant species, the following mitigation measures will be required where endangered species 
occur in Counties listed in the table on the following page.
For ground applications, the applicator must:
1. Apply when there is sustained wind away from native plant communities, OR
2. Leave 50 foot untreated buffer between treatment area and native plant communities. 
For aerial applications, the applicator must:
1. Apply only when there is sustained wind away from native plant communities, OR
2. Leave 350 foot untreated buffer between treatment area and native plants.
PRECAUTIONS FOR USE
 Use adjuvants as specified on this label.
 RIMFIRE Max Herbicide is rainfast 4 hours after application to most weed species. Rainfall within 4 hours may result in 
reduced weed control.
 Applications should be made to actively growing weeds. Weed control may be reduced when weeds are under stress due to 
severe weather conditions, drought, very cold temperatures, etc. Weed control may be reduced if the herbicide application is 
made under dry, dusty conditions – especially in the wheel track areas. Ground speed for application should not exceed 10 
mph.
RESTRICTIONS FOR USE
 Do not apply RIMFIRE Max Herbicide to crops undersown with grass or legume species.
 Do not make more than one application of RIMFIRE Max Herbicide per season.
 Do not apply more than 3 ounces/acre of RIMFIRE Max Herbicide per season.
 Do not apply more than 0.053 pounds of mefenpyr-diethyl per acre per year.

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 Do not apply when wind causes drift to off-site vegetation as injury may occur. Small amounts of RIMFIRE Max Herbicide via 
drift or tank contamination can cause severe damage to crops other than wheat. Careful management of spray drifts and tank 
cleanout is required. 
 Do not apply RIMFIRE Max Herbicide in tank mixture with malathion, mancozeb, phosphorodithioate (Di-Syston), or methyl 
parathion as unacceptable crop phytotoxicity may occur.
 Do not apply RIMFIRE Max Herbicide in tank mixture with tebuconazole.
 Do not harvest wheat for forage before 30 days or grain and straw 71 days after a RIMFIRE Max Herbicide application.

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IMPORTANT: READ BEFORE USE
Read the entire Directions for Use, Conditions, Disclaimer of Warranties and Limitations of Liability before using this product. If terms 
are not acceptable, return the unopened product container at once.
By using this product, user or buyer accepts the following Conditions, Disclaimer of Warranties and Limitations of Liability.
CONDITIONS: The directions for use of this product are believed to be adequate and must be followed carefully. However, it is 
impossible to eliminate all risks associated with the use of this product. Crop injury, ineffectiveness or other unintended consequences 
may result because of such factors as weather conditions, presence of other materials, or the manner of use or application, all of which 
are beyond the control of Bayer CropScience. All such risks shall be assumed by the user or buyer.
DISCLAIMER OF WARRANTIES: TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, BAYER CROPSCIENCE MAKES NO 
OTHER WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE OR 
OTHERWISE, THAT EXTEND BEYOND THE STATEMENTS MADE ON THIS LABEL. NO AGENT OF BAYER CROPSCIENCE IS 
AUTHORIZED TO MAKE ANY WARRANTIES BEYOND THOSE CONTAINED HEREIN OR TO MODIFY THE WARRANTIES 
CONTAINED HEREIN. TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, BAYER CROPSCIENCE DISCLAIMS ANY 
LIABILITY WHATSOEVER FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OR 
HANDLING OF THIS PRODUCT.
LIMITATIONS OF LIABILITY: TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, THE EXCLUSIVE REMEDY OF THE 
USER OR BUYER FOR ANY AND ALL LOSSES, INJURIES OR DAMAGES RESULTING FROM THE USE OR HANDLING OF THIS 
PRODUCT, WHETHER IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY OR OTHERWISE, SHALL NOT 
EXCEED THE PURCHASE PRICE PAID, OR AT BAYER CROPSCIENCE’S ELECTION, THE REPLACEMENT OF PRODUCT.
NET CONTENTS:
Bronate Advanced, Huskie and Olympus are trademarks of Bayer. Baythroid, Buctril, Rimfire, Stratego, Sevin, and Silverado are 
registered trademarks of Bayer.
Headline is a registered trademark of BASF Corporation.
Ally, Ally Extra, Affinity Tankmix, Affinity Broadspec, Express, Harmony Extra XP and Harmony are registered trademarks of E.I. 
DuPont de Nemours Company.
Topsin is a registered trademark of Cerexagri, Inc.
Starane, Stinger and WideMatch are trademarks of Dow AgroSciences LLC.
Tilt, and Warrior are registered trademarks of Syngenta Crop Protection, Inc.
Produced for
Bayer CropScience LP
800 N. Lindbergh Blvd
St. Louis, MO 63167
1-866-99BAYER (1-866-992-2937)
RIMFIRE Max Herbicide (PENDING) 03/01/2024, 12/19/2024