Identification
Na2HPO4
M = 141,96 g/mol
CAS [7558-79-4]
EC number: 231-448-7
Taric code: 2835 22 00
Synonyms
Disodium hydrogen phosphate, Sodium phosphate dibasic
Applications
analytical chemistry, in buffer solutions.
Specifications
assay (acidimetric)……… min. 99,0 %
identity (IR-spectrum)…………… passes test
insoluble in water………. max. 0,01 %
pH (5 %, H2O)………………… 8,7 – 9,3
chlorides (Cl)…………….. max. 0,001 %
sulfates (SO4)…………… max. 0,005 %
copper (Cu)……………….. max. 3 ppm
heavy metals…………….. max. 0,001 %
iron (Fe)……………………. max. 0,001 %
lead (Pb)……………………. max. 0,001 %
loss on drying (105 ºC)…. max. 0,2 %
potassium (K)……………… max. 0,01 %
Packaging
- 500 g
- 1000 g
- 25 kg
Physical data
- Appearance: floury powder, white
- Spec. Density: 1,53 g/cm3
- Bulk density: ~ 880 kg/m3
- Solub. in water: (20 ºC): 77 g/l
- Melting point: ~ 250 ºC (decomposes)
- pH(20 g/l H2O, 20 ºC) 8,7 – 9,3
- Hygroscopic