Home / Standards / GB/T 21896-2019 GB/T 21896-2019 Active 2-Naphthylamine-1,5-disulfonic acid (sulphonic Tobias acid ) 2-萘胺-1,5-二磺酸(磺化吐氏酸) Standard Type GBT ICS 71.100.01;87.060.10 CCS G56 Status 现行 Issue Date 2019-12-31 Implementation 2020-11-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A