Characters. - In powder, or small opaque irregular scales, white, of a saline and not unpleasant taste.

Reactions. - It gives the reactions showing the presence of sodium, and of carbonic acid. It is distinguished from carbonate by its solution in cold water giving a white and not a coloured precipitate with solution of perchloride of mercury.

20 grains of Bicarbonate of Sodium neutralise

16.7 grains of Citric Acid, or 17.8 grains of Tartaric Acid.

Dose. - 10 to 60 grains.

Preparations Containing Bicarbonate Of Sodium

B.P.

Dose.

Liquor Sodae Effervescens (soda-water)..................

30 grains in 1 pint.....

1/6-1 pint.

Sodii Citro-tartras Effervescens................................

17 parts in 31 ...................

6 grs. to 1/4-oz.

Trochisci Sodii Bicarbonatis.....................................

5 grs. in each lozenge.......

1 to 6.

U.S.P.

Sodii Bicarbonas Venalis (for external use).

Mistura Rhei et Sodae.........................................

................2 dr. to 3 oz.

Pulvis Effervescens Compositus.........................

.................one or two powders.