单词 | classification of poisons |
释义 | classification of poisonsDefinition US Department of Transport divides poisons in two classes (1) Class-A: highly toxic chemicals which even in very small quantities as gas or vapor in air are dangerous to life (such as cyanogen, hydrocyanic acid, nitrogen peroxide, and phosgene). (2) Class-B: chemicals other than those included in Class-A and comparatively less toxic but considered dangerous. |
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