Potassium Nitrate

MOLECULAR FORMULA :- KNO3

MOLECULAR WEIGHT :- 101.1g/mol

SPECIFICATION BP USP
Description White or almost white, crystalline powder or colorless crystals. White or almost white, crystalline powder or colorless crystals.
Solubility Freely soluble in water, very soluble in boiling water, practically insoluble in ethanol (96 %)
Identification

A.   Reaction

B.   Reaction

A.   It gives reaction of nitrates.

B.   It gives reaction of Potassium

A.   It gives reaction of nitrates.

B.   It gives reaction of Potassium

Acidity or Alkalinity NMT 0.5 ml of 0.01 M HCl or 0.01 M NaOH is required to change the color of the indicator.
Reducible Substances The solution does not become blue within 2 min.
Chlorides NMT 20 ppm NMT 300 ppm
Sulfates NMT 150 ppm NMT 1000 ppm
Limit of Nitrite NMT 5 ppm
Heavy metals NMT 20 ppm
Arsenic NMT 3 ppm
Lead NMT 10 ppm
Ammonium NMT 100 ppm
Calcium NMT 100 ppm
Iron NMT 20 ppm NMT 10 ppm
Residual Solvents Meets the requirements.
Sodium NMT 1000 ppm NMT 1000 ppm
Loss on Drying NMT 0.5 %
Assay 99.0 %-101.1 % (on dried basis) 99.0 %-100.5  %