di-Sodium hydrogen phosphate dihydrate, HPLC grade, Sodium monohydrogen phosphate, Sodium phosphate dibasic
Characteristic
Volume : x 250 g
- Synonyms: Sodium monohydrogen phosphate, Sodium phosphate dibasic
- Na2HPO4·2H2O
- M = 177,99 g/mol
- CAS [10028-24-7]
- EINECS-No.: 231-448-7
- Solub. in water: (20 ºC): 93 g/l
- Melting point: 92,5 ºC (release of crystalline water)
- LD 50 (oral, rat): 17000 mg/kg (anhydrous substance)
- Tariff number: 2835 22 00 00
- Applications: analytical chemistry, in buffer solutions (phosphates).
SPECIFICATIONS
assay (acidimetric, referred to dried sample): min. 99,5 %
identity (IR): passes test:
insoluble in water : max. 0,4 %
pH (5 %, H2O): 9,0 - 9,2
wavelength:: absorbance:
230 nm: 0,1 AU
260 nm: 0,06 AU
280 nm: 0,04 AU
320 nm: 0,02 AU
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