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Potassium hydrogen phthalate, for analysis, ExpertQ®, Reag. Ph Eur

- Synonyms: Potassium biphthalate, Phthalic acid monopotassium salt, KHPr- C8H5KO4r- M = 204,22 g/molr- CAS [877-24-7]r- EINECS-No.: 212-889-4r- Solub. in water: (20 ºC): 80 g/lr- Melting point: 295 - 300 ºCr- LD 50 (oral, rat): > 3200 mg/kgr- Tariff number: 2917 39 80 80r- Applications: analytical chemistry, titrant in volumetric analysis (bases), in buffer solutions.rrSPECIFICATIONSrassay (acidimetric, on dried sample): min. 99,9 %ridentity (IR-spectrum): passes testrinsoluble in water: max. 0,005 %rphthalic acid: max. 0,005 %rchlorides (Cl): max. 0,002 %rsulfates (SO4): max. 0,005 %rcadmium (Cd): max. 5 ppmrcobalt (Co): max. 5 ppmrcopper (Cu): max. 2 ppmrheavy metals (as Pb): max. 5 ppmriron (Fe): max. 5 ppmrlead (Pb): max. 5 ppmrnickel (Ni): max. 5 ppmrsodium (Na): max. 0,01 %rzinc (Zn): max. 5 ppmrloss on drying (105 ºC): max. 0,2 %r