A . 经口LD,-5mg/kg;经皮接触24hLD50-40mg/kg;粉尘、烟雾或蒸气吸人1hLC,-0.5mg/1的液体或固体。
B . 经口5mg/kg＜LD,-30mg/kg;经皮接触24h40mg/kg＜LD50≤100mg/kg;粉尘、烟雾或蒸气吸人1h0.5mg/1＜LC50≤1mg/l的液体或固体。
C . 经口30mg/kg＜LD50≤50mg/kg;经皮接触24h100mg/kg＜LD50≤200mg/kg;粉尘、烟雾或蒸气吸入1hlmg/1＜LC50≤2mg/l的液体或固体。
D . 固体经口50mg/kg＜LD50≤500mg/kg;液体经口50mg/kg＜LD50≤2000mg/kg;经皮接触24h200mg/kg＜LD50≤1000mg/kg;粉尘、烟雾或蒸气吸人1h2mg/1＜LC50≤10mg/1的液体或固体。