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SODIUM THIOSULPHATE PENTAHYDRATE Extra Pure

Product Code: 06049


Specifications

Appearance Large, colourless crystals or coarse crystalline powder
Assay (iodometric) 99-100.5%
Identity Passes test
Appearance of solution Dissolve 10.0 g in 50 ml of distilled water R, add 1 ml of 0.1 M sodium hydroxide and dilute to 100 ml with the same solvent. Clear & colourless
pH (10% solution in water) 6.0 - 8.4
Chloride (Cl) Max 0.05%
Sulphate and Sulphite (as SO4) Max 0.2%
Sulphide (S) Passes test
Heavy metal (as Pb) Max 0.001%
Calcium (Ca) Passes test
Water (H2O) 32.0 - 37.0%

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