Home / Standards / GB/T 666-2011 GB/T 666-2011 Active Chemical reagent - Zinc sulfate heptahydrate 化学试剂 七水合硫酸锌(硫酸锌) Standard Type GBT ICS 71.040.30 CCS G62 Status 现行 Issue Date 2011-05-12 Implementation 2011-12-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A