GB 1257-1989Working chemical--Potassium hydrogen phthalate (English PDF)
工作基准试剂（容量） 邻苯二甲酸氢钾
GB 1257 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| GB 1257-2007 | Working chemical—Potassium hydrogen phthalate | Valid |
| GB 1257-1989 | Working chemical--Potassium hydrogen phthalate | Obsolete |
GB 1257-1989 is obsolete. It has been replaced by GB 1257-2007. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
Ministry of Chemical Industry
Level / Type
National · Mandatory
Issue date
March 1, 1989
Implementation date
December 1, 1989
Scope
GB 1257-1989 is the English-translated version of 工作基准试剂（容量） 邻苯二甲酸氢钾.
GB 1257-1989 is the Chinese national standard "Working chemical--Potassium hydrogen phthalate". It was issued on March 1, 1989 by the Ministry of Chemical Industry, and took effect on December 1, 1989. It is obsolete: it has been replaced by GB 1257-2007.
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Document preview — GB 1257-1989
National Standard of the People's Republic of China
Issued by: Ministry of Chemical Industry
Contents
- Document data
1 Document data
Sector: National standard (Mandatory).
Issuing body: Ministry of Chemical Industry.
Date of issue: 1989-03-01.
Date of implementation: 1989-12-01.
Status: obsolete, replaced by GB 1257-2007.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
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GB 1257-1989
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