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di-Sodium hydrogen phosphate anhydrous, Pharmpur®, Ph Eur, BP, USP

- Synonyms: Disodium hydrogen phosphate, Sodium phosphate dibasicr- Na2HPO4r- M = 141,96 g/molr- CAS [7558-79-4]r- EINECS-No.: 231-448-7r- Solub. in water: (20 ºC): 77 g/lr- Melting point: ~ 250 ºC (decomposes)r- LD 50 (oral, rat): 17000 mg/kgr- Tariff number: 2835 22 00 00r- Applications: analytical chemistry, in buffer solutions.rrSPECIFICATIONSrassay USP (acidimetric, referred to dried sample) : 98,0 - 100,5 %rassay EP (acidimetric, referred to dried sample): 98,0 - 101,0 %rIdentification sodium: passes testrIdentification phosphate: passes testrIdentification A (EP): passes testrappearance of solution: clear and colourlessrinsoluble in water: max. 0,4 %rchlorides (Cl-): max. 200 ppmrsulfates (SO4): max. 500 ppmrsodium dihydrogenphosphate (NaH2PO4): max. 2,5 %rarsenic (As) (EP): max. 2 ppmrarsenic (As) (USP): max. 16 ppmriron (Fe): max. 20 ppmrreducing substances: passes testrloss on drying (105 °C, 4h) : max. 1,0 %rloss on drying (130 ºC): max. 5,0 %r