Sodium Phosphate 2-basic anhydrous

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