To study the subchronic toxicity of formaldehyde by inhalation in rats.
研究甲醛经呼吸道染毒的亚慢性毒性作用。
[Objective] To study the subchronic toxicity effect of difenoconazole on rats and its NOAEL.
目的研究苯醚甲环唑原药对大鼠的主要亚慢性毒性作用及无明显损害作用剂量。
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。
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