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Potassium dihydrogen phosphate, HPLC grade

- 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): min. 99,5 %ridentity (IR-spectrum): passes testrinsoluble matter: passes testrpH (5 %, H2O): 4,2 - 4,5rchlorides (Cl): max. 0,0005 %riron (Fe): max. 5 ppmrheavy metals (as Pb): max. 5 ppmrrwavelength:: absorbance:r210 nm: 0,1 AUr220 nm: 0,06 AUr230 nm: 0,04 AUr300 nm: 0,02 AUr