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SODIUM THIOSULPHATE PENTAHYDRATE Extra Pure

Confirming to BP,USP.
Sodium hyposulfite pentahydrate

COAs

Packings

500 g (00500)

1000 g (01000)

5000 g (05000)

25 Kg (0025K)

50 Kg (0050K)

1PW1200500 1PW1201000 1PW1206500 1PDL00040K 1PDLP0065K
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Article No. 06049 Grade Extra Pure
Purity 99% CAS No. 10102-17-7
Molecular Formula Na2S2O3.5H2O Molecular Weight 248.17
H.S. Code 2832.3010 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Colorless crystals
Odour Odorless pH value 6 - 8.5
Melting point/ Freezing point [°C] 48°C Boiling point [°C] > 100°C
Density [g/cm3] 1.75 Solubility in water [% weight] 79g/100 ml water @ 40C

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%
Revision Date: 09-May-2022

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