Which signal word indicates a highly toxic pesticide with Hazard Class I causing corrosive permanent or severe damage to skin, eyes, or the respiratory system?

• A. Danger
• B. Danger-Poison
• C. Warning
• D. Caution

Answer: (A)

On pesticide labels, signal words communicate how severe the acute hazard is. The strongest warning is used for substances that can cause severe or life-threatening effects, including corrosive damage to skin, eyes, or the respiratory system. For a pesticide that is Hazard Class I and can cause corrosive permanent or severe damage, the signal word is Danger. This label term immediately signals a high level of danger and the need for strict precautions and personal protective equipment.

Warning and Caution indicate progressively lower levels of hazard, while Danger-Poison is used in some cases to emphasize extreme toxicity by ingestion or inhalation; however, when the hazard includes corrosive damage to skin, eyes, or the respiratory system, plain Danger best conveys the severity.