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| Chinese National Standard Category: Reference reagent |
| English Title: | Working chemical-Potassium hydrogen phthalate |
| Chinese Title: | 工作基准试剂（容量） 邻苯二甲酸氢钾 |
| Standard No.: | GB 1257-1989 |
| Category No.: | G61 |
| Issued by: | Ministry of Chemical Industry |
| Issued on: | 1989-03-01 |
| Implemented on: | 1989-12-1 |
| Status: | superseded |
| Superseded by: | GB 1257-2007 Working chemical—Potassium hydrogen phthalate |
| Superseded on: | 2008-4-1 |
| Abolished on: | |
| Superseding: | GB 1257-1977 |
| Word Count: | 1500 words |
| Similar Standards: | GB/T 6892-2023 GB 6854-2008 GB 1258-2008 GB 12596-2008 GB 12595-2008 GB 10734-2008 GB 6857-2008 GB 10731-2008 GB 12597-2008 GB 10732-2008 GB 10736-2008 GB 1260-2008 GB 12594-2008 GB 1256-2008 GB 10735-2008 GB 6856-2008 GB 6853-2008 GB 10730-2008 GB 10733-2008 GB 1254-2007 |
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