The restricted use classification is based on the hazard of poisoning and the ________.

• A. formulation
• B. trade name
• C. effect on the environment
• D. signal words used on the label

Answer: (C)

Restricted-use status is determined by two kinds of hazard: how toxic a product is to people and how it could affect the environment. The “poisoning hazard” part covers human health risk, while the other factor looks at environmental risk—impact on non-target organisms, aquatic life, bees, soil and water quality, and potential for drift or contamination. Because the environment-facing risk is the key factor that can push a product into restricted use, the second blank is filled by the effect on the environment. Formulation or trade name don’t determine RUP status, and signal words on the label describe acute human toxicity but don’t capture the broader environmental risk.