(Solution of Calcium Hydroxide; Lime Water.)

Origin. - A saturated aqueous solution which should contain not less than 0.14 per cent. of pure calcium hydroxide.

Description and Properties. - A clear, colorless liquid, without odor, and having a saline and feebly caustic taste. It absorbs carbon dioxide from the air, so that a pellicle of calcium carbonate forms on the surface of the liquid. On being heated it becomes turbid through separation of calcium hydrate, which redissolves when the liquid is cooled. It gives a strong alkaline reaction with litmus-paper.

Dose. - 1/4-4 ounces (15.0-118.3 Cc.) [4 fluidrams (16 Cc), U. S. P.].

Official Preparations

Linimeutum Calcis - Linimenti Calcis - Lime Liniment (Carron Oil). Equal parts of lime-water and linseed oil. For external use.

Mistura Cretae - Misturae Cretae - Chalk Mixture. - Compound chalk powder, cinnamon water, and water.

Dose, 1-4 fluidrams (4.0-15.0 Cc.) [4 drams (16 Cc), U. S. P.].

Syrupus Calcis - Syrupi Calcis - Syrup of Lime. - Dose, 1/2-2 fluidrams (1.8-7.4 Cc.) [30 minims (2 Cc), U. S. P.].