This standard specifies the technical requirements, test methods, inspection rules, packaging and signs of the chemical reagent, stannous chloride. This standard applies to the inspection of the chemical reagent, stannous chloride.
GB 638-1988 history
2018GB/T 638-2018 Chemical reagent.Stannous chloride dihydrate
2007GB/T 638-2007 Chemical reagent.Tin(Ⅱ) Chloride dihydrate
1988GB 638-1988 Chemical reagent stannous chloride
0000 GB 638-1978
GB 638-1988 Chemical reagent stannous chloride was changed to GB/T 638-2007 Chemical reagent.Tin(Ⅱ) Chloride dihydrate.