=Calcii Sulphidum Crudum (Calc. Sulphid. Crud.), Crude Calcium Sulphide, U.S.P.= (Calx Sulphurata, U.S.P. VIII, Sulphurated Lime).--CaS (not less than 55%).
A pale gray or yellowish powder, with a faint hydrogen sulphide odor and a nauseous, alkaline taste. Very slightly soluble in cold water, insoluble in alcohol.
ACTION AND USES: Externally, depilatory similar to barium sulphide. Internally has been used to arrest and prevent suppuration especially in boils, carbuncles and pustular acne. There is no reliable evidence of its therapeutic usefulness.
DOSAGE: 0.06 Gm. or 1 grain (U.S.P.), in solution.
_Liquor Calcis Sulphuratae (Liq. Calc. Sulphurat.), Solution of Sulphurated Lime, N.F._ (Solution of Oxysulphuret of Calcium, Fleming's Solution, Vleminckx' Solution, Vleminckx' Lotion).--A solution of calcium polysulphides and calcium thiosulphate produced by boiling together lime, sulphur and water.
=Calendula (Calend.), Calendula, N.F.= (Marigold, Calendula Flowers).
ACTION AND USES: Locally, mild irritant, without material advantage over diluted alcohol. Internally, no definite indications for its use.
_Fluidextractum Calendulae (Fldext. Calend.), Fluidextract of Calendula, N.F._--Calendula (100%). Absolute alcohol content about 80 per cent.
_Tinctura Calendulae (Tr. Calend.), Tincture of Calendula, N.F._--Calendula (20%) in alcohol. Absolute alcohol content about 90 per cent.
=Calumba (Calumb.), Calumba, U.S.P.= (Columba, Columbo, Colombo).--A root.
ACTION AND USES: Used as a simple bitter and stomachic. It appears to have no advantage over other bitters, for instance, gentian.
DOSAGE: 2 Gm. or 30 grains (U.S.P.); usually given in the form of the tincture.
_Fluidextractum Calumbae (Fldext. Calumb.), Fluidextract of Calumba, N.F._--Calumba (100%). Absolute alcohol content about 65 per cent.
_Tinctura Calumbae (Tr. Calumb.), Tincture of Calumba, U.S.P._--Calumba (20%) in alcohol and water. Absolute alcohol content about 55 per cent.
=*Calx (Calx), Calcium Oxide, U.S.P.= (Lime, Quicklime).--CaO.
Hard, white, odorless masses with a caustic taste, forming with water calcium hydroxide, which is slightly soluble in water (1:84), insoluble in alcohol.
ACTION AND USES: As liquor calcis (an aqueous solution of calcium hydroxide), used as an antacid and mild alkali. As milk of lime (a mixture of calcium hydroxide and water), frequently used as a disinfectant.