*Acidum Boricum (Acid. Bor.) Boric Acid, U.S.P. (Boracic Acid).—H3BO3.

Colorless, odorless scales or powder with a faintly bitter taste. Soluble in water and in alcohol (1:18); freely soluble in glycerin (1:4).

Action and Uses: Mild antiseptic and astringent.

Dosage: 0.5 Gm. or 8 grains (U.S.P.), in solution. A watery solution, ranging from 2 per cent. to saturated, is used in the treatment of conjunctivitis, cystitis, etc. Externally used as dusting powder.

*Glyceritum Boroglycerini (Glycer. Boroglyc.), Glycerite of Boroglycerin, U.S.P.—Boroglycerin in glycerin representing 31% boric acid.

Liquor Antisepticus (Liq. Antisept.), Antiseptic Solution, N.F.—Boric acid (2.5%), thymol, eucalyptol, methyl salicylate, oil of thyme, menthol, sodium salicylate and sodium benzoate in alcohol and water.

Uses: Needlessly complex aromatic mouthwash.

*Unguentum Acidi Borici (Ung. Acid. Bor.), Ointment of Boric Acid, U.S.P.—Boric acid (10%) in paraffin and white petrolatum.

Acidum Bromauricum (Acid. Bromaur.), Bromauric Acid, N. F.—Corresponds to not less than 32 per cent. of metallic gold.

A dark-brown, odorless solid, with a metallic acid taste. Very soluble in water and in alcohol.