Potassium Phosphate Monobasic

MOLECULAR FORMULA :- KH2PO4

MOLECULAR WEIGHT :- 136.10 g/mol

SPECIFICATION IP BP USP
Description   White or almost white powder , crystalline powder , colorless powder or crystalline masses, efflorescent. White or almost white powder , crystalline powder , colorless powder or crystalline masses, efflorescent.
Appearance of solution   4% w/v Solution is clear and colorless
Solubility   Soluble in water , very soluble in boiling water and freely soluble in glycerol.
Identification

(A)    Reaction

(B)    Reaction

(C)    Reaction

 

   

A. Solution S is faintly acid

B. Reaction of  Potassium

C. Reaction for Phosphates

 

A. Reaction of  Potassium

B. Reaction for  Phosphates

pH (4% w/v solution in water)   4.2-4.5
Sulphate    

NMT 50 ppm.

 

Ammonium    

NMT10 ppm.

 

Arsenic   NMT 2 ppm. NMT 3 ppm
Sodium   NMT 1000 ppm
Iron   NMT 10 ppm
Sulphate   NMT 300 ppm
Chloride   NMT 200 ppm
Lead   NMT  5 ppm
Heavy Metal   NMT 20 ppm
Fluoride   NMT 10 ppm
Reducing Substances   The colour of permanganate is not completely discharged
Residual Solvents   Meets the requirement
Organic volatile impurities   Meets the requirement
Insoluble substances   Max. 0.2%
Loss on Drying at 1050C   Max. 2.0% Max. 1.0%
Assay Na2B4O7,10H2O   98.0 % – 100.5 98.0 % to 100.5 %