Disodium Phosphate Properties, Molecular Formula, Applications - WorldOfChemicals

Disodium Phosphate Properties

Disodium Phosphate

Disodium Phosphate-Molecule 3D Struture
Molecule Structure Image



Disodium hydrogen phosphate is a sodium salt of phosphoric acid. It is a white powder that is highly hygroscopic and water soluble. It is therefore used commercially as an anti-caking additive in powdered products. It is used in conjunction with trisodium phosphate in many steam boiler applications. It supplies the inventory of free phosphates to retard calcium scale formation. Monobasic and dibasic sodium phosphate is used as a saline laxative to treat constipation or to clean the bowel before a colonoscopy.

Chemical Properties

Appearance White crystalline solid
CAS Number 7558-79-4
Density 0.5–1.2 g/cm3
EINECS Number 231-448-7
HS Code 28352200
IUPAC Name Sodium Hydrogen Phosphate
InChI 1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-3
Main Hazards Irritant
Melting Point 250 ºC
Molar Mass 141.9 g/mol
Molecular Formula Na2HPO4
NFPA 704 H-1,F-0,R-0,C-NA
Other_Cations Dipotassium Phosphate;Diammonium Phosphate
RTECS Number WC4500000
Related Compounds Monosodium Phosphate;Trisodium Phosphate
Solubility 7.7 g/100 ml
Synonyms Disodium Hydrogen Orthophosphate;Sodium Hydrogen Phosphate;Sodium Phosphate Dibasic
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