Home / Standards / GB/T 21840-2025 GB/T 21840-2025 Active Vulcanizing accelerator—N-tert-butyl-1,3-benzothiazole-2-sulfenamide(TBBS) 硫化促进剂 N-叔丁基-1,3-苯并噻唑-2-次磺酰胺(TBBS) Standard Type GBT ICS 83.040.20 CCS G71 Status 现行 Issue Date 2025-08-01 Implementation 2026-02-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A