Pesticide Labeling Requirements Under FIFRA: Signal Words and PPE

Every pesticide sold in the United States must carry a label that meets federal pesticide labeling requirements set by the Environmental Protection Agency under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). The label is not advisory. Applying a product in any way that contradicts it is a federal violation punishable by civil penalties up to $24,885 per offense.¹ FIFRA gives the EPA authority to regulate the sale, distribution, and use of pesticides nationwide, and the label is how that authority reaches the person holding the container.²

Label Versus Labeling

FIFRA draws a legal distinction that matters in practice. The “label” is the printed material on the container or attached to it. “Labeling” is broader; it takes in the label plus any written or printed material that accompanies the product or that the label references.³ Supplemental directions, technical bulletins, and referenced guidance documents are all legally part of the labeling. When the statute says a product cannot be used “inconsistent with its labeling,” those documents count.

What Every Pesticide Label Must Show

Federal regulations list nine categories of information that must appear clearly and prominently on every registered pesticide label.⁴ Required text must be at least 6-point type, set against a contrasting background, and not crowded or obscured by graphics.

Product Name and Ingredient Statement

The product name, brand, or trademark must appear on the front panel so buyers can distinguish it from competing formulations. The ingredient statement is normally required on the front panel, though the EPA can grant an exception if the container’s size or shape makes that impractical. The statement must list the name and percentage by weight of each active ingredient, plus the total percentage of all inert ingredients.³ A product whose label omits or misplaces the ingredient statement is considered misbranded.⁵

Net Contents and Producer Information

The label must state the net weight or volume inside the container, excluding packaging. Liquids are measured in fluid ounces, pints, quarts, or gallons at 68°F; solids and semisolids in pounds and ounces.⁴ The name and address of the producer or the company for which the product was made must also appear. If the named company is not the actual manufacturer, a qualifying phrase like “Packed for” or “Distributed by” is required.

EPA Registration and Establishment Numbers

The EPA Registration Number links the container to an approved formulation on file with the agency. In “6767-230,” 6767 identifies the company holding the registration and 230 identifies the specific product.⁶ The EPA Establishment Number is separate and identifies the specific facility where the product was last produced or packaged. Together, the two numbers let regulators trace any container through the supply chain during a recall or enforcement action.

Signal Words and Toxicity Categories

Every pesticide is tested for acute toxicity through five exposure routes: oral, dermal, inhalation, eye irritation, and skin irritation. The results place the product into one of four toxicity categories, and the highest-hazard category from any single route determines the signal word on the front panel.⁷

DANGER (Category I) is the most hazardous group, including products with an oral LD50 of 50 mg/kg or less, corrosive effects on eye or skin, or an inhalation LC50 of 0.2 mg/liter or less.
WARNING (Category II) covers moderately toxic products with an oral LD50 above 50 through 500 mg/kg, and effects that may include reversible corneal opacity or severe skin irritation.
CAUTION (Category III) covers lower-toxicity products with an oral LD50 above 500 through 5,000 mg/kg and only mild or reversible irritation.
Category IV products require no signal word. If a manufacturer chooses to include one, it must be “CAUTION.”

The signal word must be set in capital letters sized to the front panel: 6-point on labels five square inches or smaller, scaling up to 18-point on labels over 30 square inches.⁸ Full thresholds for each exposure route appear at 40 CFR 156.62.⁹

Safety and Precautionary Statements

Keep Out of Reach of Children

Every pesticide product, regardless of toxicity category, must bear the statement “Keep Out of Reach of Children” on the front panel on a separate line near the signal word. Category IV products that require no signal word still need this child hazard warning.¹⁰

Human Hazard Statements and PPE

Beyond the signal word, the label must describe the injuries the pesticide can cause and how to reduce contact through skin, eye, or inhalation routes. The label also specifies any required personal protective equipment, such as chemical-resistant gloves, protective eyewear, coveralls, or respiratory protection. Anyone handling the product must wear the PPE the label lists.¹¹

First Aid

The first aid statement provides emergency guidance for accidental exposure: what to do if the product is swallowed, inhaled, or gets on skin or in eyes. For Category I products the statement must appear on the front panel, though the EPA can allow it to move if a reference like “See first aid statement on back panel” is on the front. For Category II and III products, first aid can go on any panel.¹²

Environmental Hazards

Labels must disclose risks to wildlife and ecological systems. If a product is toxic to bees, fish, birds, or other non-target species, the label says so and often imposes restrictions such as buffer zones around water sources or prohibitions on application during high winds. These warnings are governed by subpart E of 40 CFR Part 156.⁴

Directions for Use

Directions for use are not recommendations. Federal law makes it illegal to use any registered pesticide in a manner inconsistent with its labeling.¹³ That principle appears on the label itself as a “misuse statement,” and it converts the directions into a legally enforceable ceiling on application.

Directions cover the target pests, approved application sites, application methods and equipment, and the maximum application rate. Rates are usually expressed as a maximum amount of product per acre or per volume of water, and the label specifies how many applications are allowed per season. Exceeding the maximum rate is where most enforcement cases start, because it leads to illegal residue levels, environmental contamination, or both.

Chemigation

Products approved for application through irrigation systems carry additional mandatory label language. The label must identify which irrigation systems are permitted and include a blanket prohibition against any system not listed. Required equipment safeguards include backflow prevention devices, automatic check valves on the injection pipeline, and interlocking controls that shut off the pesticide pump if the water pump stops or pressure drops. A person who understands the chemigation system must be present and responsible for shutting it down if something goes wrong.

Worker Protection Standard

Pesticides used in agricultural settings must reference the Worker Protection Standard (WPS) on the label. The WPS sets restricted-entry intervals during which workers cannot enter the treated area unless they qualify for a narrow early-entry exception.¹⁴ Employers must post warning signs around treated areas and provide decontamination supplies of water, soap, and towels.

Storage and Disposal

Labels must include storage and disposal instructions grouped under a “Storage and Disposal” heading. Storage sections address temperature ranges and conditions needed to keep the product stable. Disposal sections cover how to handle empty containers. For dilutable products in rigid containers, triple rinsing is the standard procedure, and the regulations spell it out: empty the container into application equipment, fill it one-quarter full with water, shake, pour the rinse water into the application equipment, and repeat twice more.¹⁵ Skipping that step before disposal creates regulatory and environmental liability.

Restricted Use Pesticide Labels

Some products are too hazardous for general public use. The EPA classifies a pesticide as Restricted Use when its toxicity to humans or non-target species exceeds certain thresholds and labeling alone cannot adequately reduce the risk.¹⁶

The statement “Restricted Use Pesticide” must appear at the top of the front panel in the same minimum type size as the signal word. Directly below, a summary of the restriction appears, most commonly: “For retail sale to and use only by Certified Applicators or persons under their direct supervision and only for those uses covered by the Certified Applicator’s certification.”¹⁷

A certified applicator supervising a non-certified worker on a restricted use application has specific obligations: provide site-specific instructions the worker can understand, verify the application equipment is in safe working condition, and maintain a means of communication throughout the job. The non-certified applicator must be at least 18, or at least 16 when supervised by an immediate family member who is a private applicator and the product is not a fumigant or certain highly toxic substance.¹⁸

Minimum Risk Products That Skip Registration

Not every pest-control product goes through EPA registration. Under 40 CFR 152.25(f), products made from certain low-risk active ingredients like peppermint oil, garlic, and citric acid are exempt from FIFRA registration.¹⁹ Exempt does not mean unregulated, and the label rules are how the exemption is maintained.

Every ingredient, active and inert, must be listed on the label by name, and active ingredients must show percentage by weight. The label must display the producer’s name, street address, city, state, zip code, and telephone number. The label cannot make claims about controlling organisms that threaten human health, including germs, disinfection, or disease-carrying pests. It cannot show an EPA registration number or a misuse statement, since both imply federal review that never happened. Any false or misleading statement, including “chemical-free,” disqualifies the product from the exemption.

Spanish Translation Deadlines

The Pesticide Registration Improvement Act of 2022 (PRIA 5) added a requirement that health and safety information on pesticide labels be translated into Spanish. The rollout is staggered by product type and toxicity:²⁰

December 29, 2025: restricted use pesticides and agricultural (non-RUP) products in Acute Toxicity Category I.
December 29, 2026: antimicrobial and non-agricultural products in Acute Toxicity Category I.
December 29, 2027: agricultural (non-RUP) products in Acute Toxicity Category II.
December 29, 2028: antimicrobial and non-agricultural products in Acute Toxicity Category II.
December 29, 2030: all remaining pesticide products.

Translations must appear on the container or be accessible through a hyperlink or scannable code printed on the label. Antimicrobial and non-agricultural products can link to Spanish-language safety data sheets instead of translating the label text.

Penalties for Label Violations

FIFRA carries both civil and criminal penalties, and the amount depends on who committed the violation.

On the civil side, registrants, commercial applicators, wholesalers, dealers, and retailers face a statutory maximum of $5,000 per violation. After inflation adjustments, that figure has risen to $24,885 per offense.¹ Private applicators face lower statutory caps, and penalties still apply after a written warning or prior citation. The EPA considers the gravity of the violation, the size of the violator’s business, and whether the violation caused actual harm when setting amounts.²¹

Knowing violations raise the stakes:²¹

Registrants, applicants, or producers face up to $50,000 in fines, up to one year in prison, or both.
Commercial applicators and distributors face up to $25,000 in fines, up to one year in prison, or both.
Private applicators face a misdemeanor carrying up to $1,000 in fines, up to 30 days in jail, or both.

The EPA can also issue a Stop Sale, Use, or Removal Order (SSURO) under FIFRA Section 13 when it has reason to believe a pesticide is being sold in violation of the law, typically because the product is unregistered or misbranded. An SSURO freezes the product in place. The recipient cannot sell, ship, use, or move it without written EPA approval, and the order stays in effect until the agency lifts it.²² For a business sitting on inventory, that alone can be costly before any fine is assessed.

1
eCFR. 40 CFR Part 19 – Adjustment of Civil Monetary Penalties for Inflation
2
Environmental Protection Agency. Summary of the Federal Insecticide, Fungicide, and Rodenticide Act
3
Office of the Law Revision Counsel. 7 U.S.C. 136 – Definitions
4
eCFR. 40 CFR 156.10 – Labeling Requirements
5
Office of the Law Revision Counsel. 7 U.S.C. 136 – Definitions – Section: Misbranded
6
Environmental Protection Agency. Label Review Manual – Chapter 14: Identification Numbers
7
eCFR. 40 CFR 156.64 – Signal Word
8
eCFR. 40 CFR 156.60 – General Precautionary Statements
9
eCFR. 40 CFR 156.62 – Toxicity Category
10
eCFR. 40 CFR 156.66 – Child Hazard Warning
11
eCFR. 40 CFR 170.240 – Personal Protective Equipment
12
eCFR. 40 CFR 156.68 – First Aid Statement
13
Office of the Law Revision Counsel. 7 U.S.C. 136j – Unlawful Acts
14
eCFR. 40 CFR Part 170 – Worker Protection Standard
15
eCFR. 40 CFR 156.146 – Residue Removal Instructions for Nonrefillable Containers
16
eCFR. 40 CFR Part 152 – Pesticide Registration and Classification Procedures
17
eCFR. 40 CFR Part 156 – Labeling Requirements for Pesticides and Devices
18
eCFR. 40 CFR 171.201 – Requirements for Direct Supervision of Noncertified Applicators
19
U.S. Environmental Protection Agency. Conditions for Minimum Risk Pesticides
20
U.S. Environmental Protection Agency. Bilingual Labeling
21
Office of the Law Revision Counsel. 7 U.S.C. 136l – Penalties
22
U.S. Environmental Protection Agency. Stop Sale, Use, or Removal Orders Issued to Amazon Services, LLC, and Sirowl Technology, LLC