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International Standard Category: Chemical reagents |
Category No.: | 71.040.30 | Valid Status: | superseded |
Issued Organization: | China Oil and Chemical Industry Association | Issued Date: | 1992-09-01 |
Implemented Date: | 1993-7-1 | Abolished Date: | |
Superseded Standard.: | GB/T 661-2011 Chemical reagent—Ammonium iron(Ⅱ) sulfate hexahydrate |
Superseded Date: | 2011-12-1 |
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