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Sodium thiosulfate pentahydrate, for analysis, ExpertQ®, ACS, ISO, Reag. Ph Eur

- Synonyms: Antichlorr- Na2S2O3·5H2Or- M = 248,18 g/molr- CAS [10102-17-7]r- EINECS-No.: 231-867-5r- Solub. in water: (20 ºC): 680 g/lr- Melting point: 48,5 ºCr- LD 50 (oral, rat): > 8000 mg/kgr- Tariff number: 2832 30 00 00r- Applications: analytical chemistry, titrant in volumetric analysis (iodometric analyses), photography, laboratory reagent, for determination of: cobalt, hydrocyanic acid, quinine.rrSPECIFICATIONSrassay (iodometric): 99,5 - 101 %ridentity: passes testrappearance of solution: passes testrinsoluble in water: max. 0,005 %rpH (5 %, H2O): 6,0 - 7,5 rchlorides (Cl): max. 0,008 %rsulfates and sulfites (as SO4): max. 0,1 %rsulfides (S): passes testrtotal nitrogen (as N): max. 0,002 %rcalcium (Ca): max. 0,002 %rcopper (Cu): max. 0,0005 %rheavy metals (as Pb): max. 0,001 %riron (Fe): max. 0,0005 %rlead (Pb): max. 0,0005 %rmagnesium (Mg): max. 0,001 %rpotassium (K): max. 0,001 %r