Sodio tiosolfato anidro, EssentQ®

- Synonyms: Antichlor
- Na2S2O3
- M = 158,10 g/mol
- CAS [7772-98-7]
- EINECS-No.: 231-867-5
- Solub. in water: (20 ºC): 500 g/l
- Melting point: 48 °C
- Boiling point: 100 °C
- LD 50 (oral, rat): > 8000 mg/kg (pentahydrate)
- 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, on dried sample): min. 98 %
insoluble in water: max. 0,01 %
pH (5 %, H2O): 6,0 - 8,5
chlorides (Cl): max. 0,15 %
sulfates and sulfites (as SO4): max. 0,5 %
sulfides (S): max. 0,0005 %
calcium (Ca): max. 0,004 %
cadmium (Cd): max. 0,001 %
cobalt (Co): max. 0,001 %
copper (Cu): max. 0,001 %
heavy metals (as Pb): max. 0,005 %
iron (Fe): max. 0,005 %
lead (Pb): max. 0,001 %
nickel (Ni): max. 0,001 %
zinc (Zn): max. 0,001 %