USP Grade Potassium Chloride

Item Of Analysis

IP/BP Limit

USP Limit

Results

Description

Colorless crystals or a white crystalline powder, Odorless,

Colorless crystals, Odorless,

White crystalline powder

Identification

a)It gives the reactions of Potassium salts.

b)It gives the reactions of Chlorides

a)It gives the reactions of Potassium salts.

b)It gives the reactions of Chlorides

Complies

Appearance of solution

Solution A is clear and colorless.

Solution A is clear and colorless.

Complies

Solubility (solution 10% in water)

Freely soluble in water and practically insoluble in ethanol and in ether.

Freely soluble in water

Complies

Acidity/ Alkalinity

Not more than 0.5 ml of 0.01 M NaOH or 0.01M Hydrochloric acid is required for neutralization of Bromothymol blue solution.

Passes test

Complies

Arsenic

Not more than 1 ppm.

Complies

Heavy Metals

< 10 ppm

Complies

Calcium and Magnesium

The solution remains clear.

No turbidity is produced within 5 mins.

Complies

Bromides

NMT 0.1%

NMT 0.1%

Complies

Sodium

NMT 0.1%

Passes test

0.0848%

Iodides

No blue colour is observed after 5 mins.

NMT 0.005 %

Complies

Sulphates

Less than 300 ppm.

Complies

Barium

Solution remains clear

Complies

Iron

NMT 20 ppm.

Complies

Loss on drying

1.0 % max at 105 deg C for 2 hrs

NMT 1.0 % max at 105 deg C for 2 hrs

0.49% (when packed)

Assay

NLT 99.0 and NMT 100.05% on dried basis

99.0 TO 100.05%

99.76%