Minimum risk pesticides and the FIFRA exemption checklist
Minimum risk pesticides qualify for a conditional FIFRA exemption, not EPA approval. Check ingredients, label claims, food uses and state registration.
Minimum risk pesticides qualify for a conditional exemption from FIFRA regulation under 40 CFR 152.25(f), commonly called FIFRA 25(b). EPA exempt means the product meets every condition and therefore doesn't need EPA registration. Food-residue limits and state registration are separate checks. Exemption does not mean EPA approval.
For a manufacturer or label reviewer, the question is whether the complete product meets those conditions. An eligible active ingredient alone does not establish eligibility. Check the formula, the claims and the intended use before treating a product as exempt. Section 152.25 exempts a minimum risk product from all FIFRA provisions only when it is intended for use, and used, only in the manner that section specifies.
The six conditions for FIFRA 25(b) pesticides
EPA organizes the requirements into six conditions. They cover active ingredients, inert ingredients and four labeling requirements in the federal rule.
1. Use only eligible active ingredients
Every active ingredient must meet an entry in Table 1 of §152.25(f)(1), including its identity and specifications. EPA describes active ingredients by their function: killing, repelling or mitigating the pests named on the label. Being natural or an essential oil does not establish eligibility. See EPA's active ingredient guidance.
2. Check every inert ingredient
Eligible inerts include the commonly consumed food commodities, animal-feed items and edible fats and oils described in §180.950(a)-(c). The specific substances in Table 2 of §152.25(f)(2)(iv) also qualify.
A substance absent from Table 2 may qualify through one of those categories. But general approval as a pesticide inert, or a tolerance exemption alone, does not meet this test. "Inert" describes the ingredient's function, not harmlessness. Use EPA's dedicated inert ingredient guidance to check the applicable route.
3. Disclose all ingredients on the label
List each active ingredient's required label display name and individual percentage by weight. Name every inert ingredient too, using Table 2 label display names where applicable. Do not hide those names behind "other ingredients." The federal exemption does not require individual inert percentages. CAS numbers can help confirm identity, but they do not replace the required names. These disclosure requirements appear in §152.25(f)(3)(i).
4. Remove prohibited public-health claims
Exempt products cannot claim to control microorganisms that threaten human health, or insects or rodents carrying specified diseases. EPA distinguishes "controls ticks" from "controls ticks that carry Lyme disease." Ordinary mosquito-control claims likewise differ from claims tied to specific diseases.
EPA also rejects disinfecting, sanitizing, sterilizing and "kill germs" claims for these products. A general pest-control claim must still meet every other exemption condition. Check the examples in EPA's conditions guidance.
5. Identify the responsible company
Prominently show the producer's name, or the company for whom the product was produced, with its address and telephone number. EPA specifies a street address, city, state and ZIP code.
If the named company is not the producer, qualify its role with wording such as "Distributed by" or "Packed for". See EPA's company identification requirements.
6. Avoid false or misleading labeling
The rule prohibits false or misleading statements and expressly incorporates the examples in §156.10(a)(5)(i)-(viii). EPA flags "chemical-free," misleading effectiveness claims and wording that implies EPA endorsement.
EPA does not review exempt products. Do not label a product "EPA approved" or present its exemption as a safety or efficacy certification. EPA's guidance explains this boundary.
Where to find the EPA 25b ingredient lists
Use the current Table 1 and Table 2 in §152.25(f), rather than a general list of natural ingredients. Eligible active label names include peppermint oil, citric acid, sodium chloride and chitosan. These are examples, not a formulation recommendation.
Read the identity restrictions in Table 1. Castor oil must be U.S.P. or equivalent. Chitosan, listed as poly-D-glucosamine, is an eligible active, and the entry includes chitosan salts only when those salts are formed solely with acids listed in Table 1 or Table 2. Zinc is limited to zinc metal strips consisting solely of zinc metal and impurities. Match the ingredient's identity and specifications, not just its familiar name.
For "EPA List 4 inerts of minimal concern," use the current rule instead. EPA's inert guidance directs readers to Table 2 and the §180.950(a)-(c) categories. A legacy List 4 or List 4A reference is not the current federal eligibility test.
Food uses need a separate check
Ingredient eligibility for a 25(b) formulation does not establish permission for every food use. Each ingredient also needs an applicable tolerance or tolerance exemption under 40 CFR Part 180. EPA's active ingredient guidance treats food, food crops, food-contact surfaces and animal feed as food-use sites. Check the intended use and any restrictions.
For listed inerts, use EPA's inert guidance. That page points to InertFinder for food and nonfood permissions. Do not treat a Table 2 listing as permission for every food use.
Federal exemption does not settle state registration
A product that meets the federal exemption conditions does not automatically have nationwide permission to sell. EPA's conditions page says states may still require registration.
Washington registers 25(b) products.
State label requirements can differ too. Washington's minimum-risk label rule requires all inert names and their combined percentage, with total ingredient percentages equaling 100%. It also requires directions, use rates and "Keep Out Of Reach Of Children," among other elements.
That state rule retains older federal and List 4A references. Ask WSDA about submission-specific requirements rather than treating those references as today's federal ingredient test. And check the destination state's pesticide agency before sale.
RegAffairs AI's answer on minimum-risk pesticide requirements covers ingredient eligibility, label claims and state registration.