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

- Synonyms: Disodium hydrogen phosphate, Sodium phosphate dibasic
- Na2HPO4
- M = 141,96 g/mol
- CAS [7558-79-4]
- EINECS-No.: 231-448-7
- Solub. in water: (20 ºC): 77 g/l
- Melting point: ~ 250 ºC (decomposes)
- LD 50 (oral, rat): 17000 mg/kg
- Tariff number: 2835 22 00 00
- Applications: analytical chemistry, in buffer solutions.

SPECIFICATIONS
assay USP (acidimetric, referred to dried sample) : 98,0 - 100,5 %
assay EP (acidimetric, referred to dried sample): 98,0 - 101,0 %
Identification sodium: passes test
Identification phosphate: passes test
Identification A (EP): passes test
appearance of solution: clear and colourless
insoluble in water: max. 0,4 %
chlorides (Cl-): max. 200 ppm
sulfates (SO4): max. 500 ppm
sodium dihydrogenphosphate (NaH2PO4): max. 2,5 %
arsenic (As) (EP): max. 2 ppm
arsenic (As) (USP): max. 16 ppm
iron (Fe): max. 20 ppm
reducing substances: passes test
loss on drying (105 °C, 4h) : max. 1,0 %
loss on drying (130 ºC): max. 5,0 %