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International Standard Category: Chemical reagents

GB 1257-1989    Working chemical-Potassium hydrogen phthalate
工作基准试剂(容量) 邻苯二甲酸氢钾 ;
Category No.:71.040.30 Valid Status:superseded
Issued Organization:Ministry of Chemical Industry Issued Date:1989-03-01
Implemented Date:1989-12-1 Abolished Date:
Superseded Standard.:GB 1257-2007 Working chemical—Potassium hydrogen phthalate
Superseded Date:2008-4-1
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