Home / Standards / GB 1257-2007 GB 1257-2007 Active Working chemical - Potassium hydrogen phthalate 工作基准试剂 邻苯二甲酸氢钾 Standard Type GB ICS 71.040.30 CCS G61 Status 现行 Issue Date 2007-10-25 Implementation 2008-04-01 Responsible Dept 工业和信息化部 Drafting Unit N/A