(Muriatic Acid).

Origin. - A liquid composed of 31.9 per cent. by weight of absolute hydrochloric acid (HCL = 36.38) and 68.1 percent, of water.

Description and Properties. - A colorless, fuming liquid, of a pungent odor and an intensely acid taste. Fumes and odor disappear on diluting the acid with 2 volumes of water. Specific gravity about 1.098 at 25o C. (77o F.). Miscible in all proportions with water and alcohol. Hydrochloric acid should be kept in dark, amber-colored, glass-stoppered bottles.

Official Preparations

Acidum Hydrochloricum Dilutum - Acidi Hydrochlorici Diluti - Diluted Hydrochloric Acid (Diluted Muriatic Acid). - Formula: Hydrochloric acid, 100; distilled water, 219.

Dose. - 10-20 minims (0.6-1.2 Cc.) [15 minims (7 Cc), U. S. P.].

Acidum Nitrohydrochloricum - Acidi Nitrohydrochlorici - Nitrohydro-chloric Acid. (Described under Nitric Acid.)

Dose. - 2-5 minims (0.12-0.3 Cc), well diluted [3 minims (0.2 Cc), U. S. P.].

Acidum Nitrohydrochloricum Dilutum - Acidi Nitrohydrochlorici Diluti -Diluted Nitrohydrochloric Acid. (Described under Nitric Acid.) Dose, 5-20 minims (0.3-1.2 Cc.) [15 minims (1 Cc), U. S. P.].