What does a 'Warning Poison' label indicate in terms of acute oral LD50?

What does a 'Warning Poison' label indicate in terms of acute oral LD50?

• A. 1000 - 2500
• B. 500 - 1000
• C. <500
• D. 2500+

Answer: (B)

Acute oral toxicity is described by the LD50 value—the amount of chemical (mg) per kilogram of body weight that would kill 50% of test animals. The pesticide label uses LD50 ranges to assign toxicity warnings. A "Warning Poison" indicates a moderate level of acute toxicity, which corresponds to an oral LD50 roughly between 500 and 1000 mg/kg. That’s why the correct interpretation is the 500–1000 mg/kg range. If the LD50 were lower than 500 mg/kg, the product would be considered more toxic and receive a stronger warning or danger designation; if the LD50 were well above 1000 mg/kg, the acute toxicity would be lower and would not carry the warning poison label.

Acute oral toxicity is described by the LD50 value—the amount of chemical (mg) per kilogram of body weight that would kill 50% of test animals. The pesticide label uses LD50 ranges to assign toxicity warnings. A "Warning Poison" indicates a moderate level of acute toxicity, which corresponds to an oral LD50 roughly between 500 and 1000 mg/kg. That’s why the correct interpretation is the 500–1000 mg/kg range. If the LD50 were lower than 500 mg/kg, the product would be considered more toxic and receive a stronger warning or danger designation; if the LD50 were well above 1000 mg/kg, the acute toxicity would be lower and would not carry the warning poison label.