Sodium Carbonate Anhydrous

Test

Limit

Solubility

Freely Soluble in water, practically insoluble in ethanol (96 %).

Appearance of solution (20 % w/v solution)

Solution is clear and not more intensely colored than reference color solution Y6

Identification

(A) By Color

A: 10 % solution is strongly alkaline.

(B) Reaction Of carbonates

B: It gives reaction of Carbonate

(C) Reaction of Sodium

C: It gives reaction of Sodium.

(D) LOD

D: It complies with limit test of Loss on drying

Alkali hydroxides and bicarbonate

The solution does not become red and after 2-minute boil the solution, the solution remains clear.

Assay

Min. 99.0%-100.5%

Loss on Drying at 300 C

1% Max

Heavy metals

Less than 50 ppm

Sulphate

Less than 250 ppm

Chloride

Less than 100 ppm

Iron

Less than 50 ppm