Compound Sodium Bicarbonate Tablets
Soda Mint Tablets
Definition
Compound Sodium Bicarbonate Tablets contain, in each, 300 mg of Sodium Bicarbonate. They have a peppermint flavour.
The tablets comply with the requirements stated under Tablets and with the following requirements.
Content of total carbonate
275 to 325 mg, calculated as NaHCO3.
Identification
A. The powdered tablets, when moistened with hydrochloric acid and introduced on a platinum wire into a flame, impart a yellow colour to the flame.
B. The powdered tablets yield the reactions characteristic of bicarbonates, Appendix VI.
Tests
Carbonate
Dissolve 2.5 g of the powder prepared for use in the Assay in 50 mL of carbon dioxide-free water. The pH of the resulting solution is not more than 8.6, Appendix V L.
Disintegration
The requirement for Disintegration does not apply to Compound Sodium Bicarbonate Tablets.
Assay
Weigh and powder 20 tablets. Dissolve 1 g of the powder in 20 mL of water and titrate with 0.5m hydrochloric acid VS using methyl orange solution as indicator. Each mL of 0.5m hydrochloric acid VS is equivalent to 42.00 mg of NaHCO3.
Labelling
The label states that the tablets should be allowed to dissolve slowly in the mouth.