To study the acute and subchronic toxicity and mutagenicity of methidathion and find out its NEL.
目的研究杀扑磷原药的急性和亚慢性毒性及致突变性，求出最大无作用剂量。
Methods Acute oral toxicity test, subchronic inhalation toxicity test and mutagenicity test were conducted to observe the effects of petroleum asphalt in experimental animals.
方法通过石油沥青急性经口毒性、亚慢性吸入毒性及遗传毒性的实验研究，观察在该实验条件下，石油沥青对受试动物的影响。
These services include acute, subchronic and chronic toxicity for the safety of agrochemicals, pharmaceuticals, and chemicals industries.
这些服务包括农用化学品、医药、化工行业的急性、亚慢性和慢性安全毒性。
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