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Sodium thiosulfate pentahydrate, Pharmpur®, Ph Eur, BP, USP

- Synonyms: Antichlor
- Na2S2O3·5H2O
- M = 248,18 g/mol
- CAS [10102-17-7]
- EINECS-No.: 231-867-5
- Solub. in water: (20 ºC): 680 g/l
- Melting point: 48,5 ºC
- LD 50 (oral, rat): > 8000 mg/kg
- Tariff number: 2832 30 00 00
- Applications: analytical chemistry, titrant in volumetric analysis (iodometric analyses), photography, laboratory reagent, for determination of: cobalt, hydrocyanic acid, quinine.

SPECIFICATIONS
assay (iodometric, referred to dried sample): 99,0 - 100,5 %
assay (iodometric): 99,0 - 101,0 %
Identification A (EP): passes test
Identification B (EP): passes test
Identification C (EP): passes test
Identification sodium: passes test
Identification IR: passes test
appearance of solution: passes test
pH (10 %, H2O): 6,0 - 8,4
sulfates and sulfites (as SO4): max. 0,2 %
sulfides (S): passes test
calcium (Ca): passes test
water content: 32,0 - 37,0 %