Home / Standards / GB/T 631-2007 GB/T 631-2007 Active Chemical reagent - Ammonia solution 化学试剂 氨水 Standard Type GBT ICS 71.040.30 CCS G62 Status 现行 Issue Date 2007-10-25 Implementation 2008-04-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A