| 单词 | highly toxic |
| 释义 | highly toxichighly toxicadjective Referring to a chemical that:(1) Has a median lethal dose (LD50) of ≤ 50 mg/kg when administered orally to 200–300 g albino rats; or (2) Has an LD50 of ≤ 200 mg/kg when administered by continuous contact for 24 hours on the shaved skin of 2.0–3.0 kg albino rabbits; or (3) Has an LD50 of ≤ 200 ppm of volume of gas or vapour, or ≤ 2 mg/L of mist or dust, when administered by continuous inhalation to 200–300 g albino rats. highly toxicOccupational medicine adjective Referring to a chemical that 1. Has a median lethal dose–LD50 of ≤ 50 mg/kg when administered orally to 200-300 g albino rats 2. Has an LD50 of ≤ 200 mg/kg when administered by continuous contact for 24 hrs on the shaved skin of 2.0-3.0 kg albino rabbits 3. Has an LD50 of ≤ 200 ppm of volume of gas or vapor, or ≤ 2 mg/L of mist or dust, when adminstered by continuous inhalation to 200-300 g albino rats |
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