Sodium Bicarbonate

Grade

BP

EP

IP

USP

Appearance

White or almost white crystalline powder

White or almost white crystalline powder, odourless

White crystalline powder or small opaque monoclinic crystals, odourless

White crystalline powder

Solubility

Freely soluble in water, practically insoluble in 96% ethanol

Freely soluble in water, insoluble in 96% ethanol

Freely soluble in water, insoluble in 95% ethanol

Soluble in water, insoluble in alcohol

Identification

It gives reactions (a) of Sodium salts, it gives reactions of carbonate & bicarbonate salts

It gives reactions of Sodium salts, it gives reactions of bicarbonate salts

It gives reactions (a) of Sodium salts, it gives reactions (a)of bicarbonate salts

It gives reactions of Sodium salts, & bicarbonate salts

Appearance of Solution (5%)

Clear and Colourless

Clear and Colourless

Clear and Colourless

Clear and Colourless

Heavy Metals

Max. 10 ppm

Max. 10 ppm

Max. 5 ppm

-

Arsenic

Max. 2 ppm

Max. 2 ppm

Max. 2 ppm

Max. 2μg/gm

Calcium

Max. 100 ppm

Max. 100 ppm

Solution remains clear

-

Iron

Max. 20 ppm

Max. 20 ppm

Max. 20 ppm

-

Ammonium

Max. 20 ppm

Max. 20 ppm

-

No Blue colour develops

Carbonate

pH not more than 8.6

pH not more than 8.6

pH not more than 8.6

Solution does not assume more than faint light pink color

Chloride

Max. 150 ppm

Max. 150 ppm

Max. 200 ppm

Max. 0.015 %

Sulphates

Max. 150 ppm

Max. 150 ppm

Max. 150 ppm

Assay

99%-101%

99%-101%

99%-101%

99%-100.5%