White, odorless powder, with a slightly bitter taste. Freely soluble in water (1:1.1) and soluble in alcohol (1:30); partly soluble in chloroform. ACTION AND USES: The form of caffeine usually employed for hypodermic administration, since it is freely soluble. DOSAGE: By mouth, 0.3 Gm. or 5 grains (U.S.P.); hypodermic, 0.2 Gm. or 3 grains (U.S.P.). =Caffeinae Sodio-Salicylas (Caff. Sod. Salicyl.), Caffeine Sodio-Salicylate, N.F.=--Represents equal parts of caffeine and sodium salicylate. White, odorless powder. Freely soluble in water (1:2). DOSAGE: 0.2 Gm. or 3 grains (N.F.) =Calamina Praeparata (Calamin. Praep.), Prepared Calamine, N.F.= (Lapis Calaminaris).--Native zinc carbonate. A pink powder. Insoluble in water. ACTION AND USES: Protective, similar to zinc oxide, over which it has no therapeutic advantage; has the cosmetic advantage of being slightly pink. _Unguentum Calaminae (Ung. Calamin.), Calamine Ointment, N.F._, (Unguentum Zinci Carbonatis Crudi, Unguentum Calaminare, Turner's Cerate).--Prepared calamine (17%) in ointment. =Calcii Bromidum (Calc. Brom.), Calcium Bromide, U.S.P.=--Hydrated calcium bromide (not less than 84 per cent. of CaBr{2}). A white, odorless, deliquescent powder, with a sharp, saline taste. Very soluble in water (1:0.7) and in alcohol (1:1.3). Incompatible with alkali carbonates and phosphates. ACTION AND USES: Similar to but more irritant than sodium bromide, over which it has ordinarily no advantage, although the calcium perhaps increases the sedative action. DOSAGE: 1 Gm. or 15 grains, preferably administered in aqueous solutions, being too deliquescent for use in powder or cachets. _Elixir Calcii Bromidi (Elix. Calc. Brom.), Elixir of Calcium Bromide, N.F._--Calcium bromide (8.5%) diluted hydrobromic acid (0.4%), syrup, distilled water and aromatic elixir. Absolute alcohol content about 7 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). =*Calcii Carbonas Praecipitatus (Calc. Carb. Praec.), Precipitated Calcium Carbonate, U.S.P.= (Precipitated Chalk).--CaCO{3}. A fine, white, odorless, tasteless powder. Nearly insoluble in water and insoluble in alcohol. Decomposed by acids with evolution of carbon dioxide. ACTION AND USES: Chiefly used as a basis for tooth powder. Internally, employed as an antacid in diarrheas, etc.; externally in mixtures with cream or oil, has been used as an application to burns as an antacid and protective. DOSAGE: 1 Gm. or 15 grains (U.S.P.), as powder or in suspension =*Calcii Chloridum (Calc. Chlor.), Calcium Chloride, U.S.P.=--Hydrated calcium chloride (not less than 75 per cent. of CaCl{2}). White, hard, deliquescent, odorless masses or granules, with a sharp, saline taste. Very soluble in water (1:0.62), and freely soluble in alcohol (1:10).