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Iron(II) sulfate heptahydrate, for analysis, ExpertQ®, ACS, ISO, Reag. Ph Eur

- Synonyms: Iron vitriolr- FeSO4·7H2Or- M = 278,02 g/molr- CAS [7782-63-0]r- EINECS-No.: 231-753-5r- Solub. in water: (20 ºC): 665 g/lr- Melting point: > 60 ºC (release of crystalline water)r- LD 50 (oral, rat): 319 mg/kg (anhydrous substance)r- GHS-signal word: Warningr- GHS-H sentences: H302 - H315 - H319r- GHS-P sentences: P280 - P305+P351+P338 - P321 - P301+P312 - P332+P313 - P501ar- Tariff number: 2833 29 80 80r- Applications: analytical chemistry, determining COD.rrSPECIFICATIONSrassay (cerimetric): 98,0 - 105,0 %rassay (KMnO4): min. 99,0 %rIdentification iron: passes testrIdentification sulfates: passes testrinsoluble matter: max. 0,01 %rpH (5 %, H2O): 3,0 - 4,0rchlorides (Cl): max. 10 ppmrphosphates (as PO4): max. 10 ppmrtotal nitrogen (as N): max. 0,001 %rarsenic (As): max. 2 ppmrcalcium (Ca): max. 10 ppmrchromium (Cr): max. 50 ppmrcobalt (Co): max. 25 ppmrcopper (Cu): max. 25 ppmriron (III) (Fe (III)): max. 0,025 %: rlead (Pb): max. 25 ppmrmagnesium (Mg): max. 20 ppmrmanganese (Mn): max. 0,05 %rnickel (Ni): max. 50 ppmrpotassium (K): max. 20 ppmrsodium (Na): max. 200 ppmrzinc (Zn): max. 50 ppmrsubstances not precipitated by ammonium hydroxide: max. 0,1 %r