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Potassium dihydrogen phosphate, for analysis, ExpertQ®, ACS, ISO, Reag. Ph Eur

- Synonyms: Potassium biphosphate, Potassium phosphate monobasic, Primary potassium phosphate, Mono-potassium phosphater- KH2PO4r- M = 136,09 g/molr- CAS [7778-77-0]r- EINECS-No.: 231-913-4r- Solub. in water: (20 ºC): 222 g/lr- Melting point: ~ 253 ºC (decomposes)r- Tariff number: 2835 24 00 00r- Applications: analytical chemistry; in buffer solutions.rrSPECIFICATIONSrassay (acidimetric, on dried sample): min. 99,5 %rassay (acidimetric, referred to dried sample): 98,0 - 100,5 %rassay (acidimetric): min. 99,0 %ridentity (IR-spectrum): passes testrappearance of solution (10 %, H2O): clear and colourlessrinsoluble in water: max. 0,01 %rpH (5 %, H2O): 4,2 - 4,5rchlorides (Cl): max. 5 ppmrsulfates (SO4): max. 0,003 %rtotal nitrogen (as N): max. 0,001 %rarsenic (As): max. 2 ppmrheavy metals: max 0,001 % riron (Fe): max. 10 ppmrsodium (Na): max. 0,005 %rreducing substances: passes testrloss on drying (105 °C, 2 h): max. 0,2 %rloss on drying (110 ºC): max. 0,2 %rloss on drying (130 ºC): max. 2,0 %r