以下是小鼠和大鼠的LD50分级标准对比：小鼠LD50分级标准（mg/kg）1.极度毒性 (Extremely Toxic): LD50 < 1 2.高毒性 (Highly Toxic): 1 ≤ LD50 < 50 3.中等毒性 (Moderately Toxic): 50 ≤ LD50 < 500 4.低毒性 (Slightly Toxic): 500 ≤ LD50 < 5000 5.基本无毒 (Practically Non-toxic): 5000 ...