Home / Standards / GB/T 21826-2025 GB/T 21826-2025 Active Chemicals—Test method of acute oral toxicity—Up-and-down-procedure(UDP) 化学品 急性经口毒性试验方法 上下增减剂量法(UDP) Standard Type GBT ICS 13.300 CCS A80 Status 现行 Issue Date 2025-10-05 Implementation 2026-02-01 Responsible Dept 国家标准委 Drafting Unit N/A