Pesticides from class 3 slightly hazardous have LD50 for rat (oral) in which range?

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Prepare for the Occupational Hygiene Test. Utilize flashcards and multiple-choice questions, all with hints and explanations. Ace your exam with ease!

Multiple Choice

Pesticides from class 3 slightly hazardous have LD50 for rat (oral) in which range?

Explanation:
Acute toxicity categories are based on LD50, the dose required to kill 50% of test animals after exposure (oral in rats). A higher LD50 means lower acute toxicity. Pesticides labeled as slightly hazardous have relatively low acute hazard, which in this scheme corresponds to an LD50 greater than 500 mg/kg body weight. So the range “over 500 mg/kg” best fits the classification. The other ranges represent higher toxicity (lower LD50), which would place substances in more hazardous categories.

Acute toxicity categories are based on LD50, the dose required to kill 50% of test animals after exposure (oral in rats). A higher LD50 means lower acute toxicity. Pesticides labeled as slightly hazardous have relatively low acute hazard, which in this scheme corresponds to an LD50 greater than 500 mg/kg body weight. So the range “over 500 mg/kg” best fits the classification. The other ranges represent higher toxicity (lower LD50), which would place substances in more hazardous categories.

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