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Potassium sulfate, Pharmpur®, Ph Eur, BP

- Synonyms: Sulfuric acid potassium saltr- K2SO4r- M = 174,27 g/molr- CAS [7778-80-5]r- EINECS-No.: 231-915-5r- Solub. in water: (20 ºC): 110 g/lr- Melting point: 1069 ºCr- Boiling point: 1689 ºCr- LD 50 (oral, rat): 6600 mg/kgr- Tariff number: 3104 30 00 00r- Applications: analytical chemistry, laboratory reagent, for determination of: nitrogen (Kjeldahl), in fertilizer compositions, manufacture of glass.rrSPECIFICATIONSrassay (acidimetric, referred to dried sample): 98,5 - 101,0 %rIdentification potassium: passes testrIdentification sulfates: passes testrappearance of solution: clear and colourlessracidity or alkalinity: passes testrchlorides (Cl): max. 40 ppmrcalcium (Ca): max. 200 ppmriron (Fe): max. 10 ppmrmagnesium (Mg): max. 20 ppmrsodium (Na): max. 0,10 %rloss on drying (130 ºC): max. 1,0 %r