Sodium Phosphate Monobasic Anhydrous

MOLECULAR FORMULA :-   NaH2PO4

MOLECULAR WEIGHT :- 120.00 g/mol

SPECIFICATION IP BP USP
Description A white powder or colorless crystals. White, slightly deliquescent crystals or granules. White, slightly deliquescent crystals or granules.
Solubility Very soluble in water and slightly soluble in ethanol (96 %).
Identification

(A)   Reaction

(B)   Reaction

(C)   Reaction

(D)   LOD

 

 

 

 

A: It gives reaction of phosphates.

B: It gives reaction of sodium salts.

 

 

 

 

 

A : 10 % solution is slightly acidic

B: It gives reaction of Phosphates.

C: It gives reaction of Sodium Salts.

D : Complies with the  test for loss on drying

 

A: It gives reaction of phosphates.

B: It gives reaction of sodium salts.

 

 

pH 4.1 – 4.5 4.2  –  4.5 4.1  –  4.5
Insoluble Substances NMT 0.2 % NMT 0.2 %
Chloride NMT 140 ppm NMT  200 ppm NMT 140 ppm
Sulphate NMT 1500 ppm NMT 300  ppm NMT 1500 ppm
Al , Ca & related –element Not became turbid when rendered slightly alkaline to litmus paper with 6 M ammonium hydroxide. Not became turbid when rendered slightly alkaline to litmus  paper
Arsenic NMT 8 ppm NMT 2 ppm NMT 8 ppm
Heavy metals NMT 20 ppm NMT 20 ppm
Water by KF NMT 2.0 % NMT 2.0 %
Organic volatile impurities Meets the requirement
Residual Solvents Meets the requirement
Iron NMT.10 ppm
Reducing substance The solution retains a slight red color.
LOD ( at 1300C ) NMT 1.0%
Assay (on dry basis) 98.0 % – 103.0 % 98.0 % – 100.5% 98.0%-103.0%