28 
Solubility. — Only slightly soluble in Tvater, but readily in alcohol 
and ether. Specitic gravity at 25° C., 2.808. It is only slightly vola- 
tile at ordinaiy temperature, boils at 148° C., and solidities at 6 ° C. 
Absolute bromoform is discomposed in presence of light and air 
more rapidly than chloroform. The addition of 1 per cent of alcohol, 
as in the case of chloroform, ^ill preserve bromoform for months. 
When decomposed, bromine is set free, which colors the liquid yel- 
lowish red. 
Dose. — “Average dose: 0.2 Cc. (3 minims).'’ (U. S. P.) 
Caution. — Keep in dark amber-colored, glass-stoppered bottles in a 
cool place, protected from light. 
CATAPLAS3IA KAOLIM. 
Cataplasm of Kaolin. 
Introduced in response to a request for an external clay preparation; 
similar to a number of commercial articles. The constituents are 
kaolin (oT.T per cent), boric acid, methyl salicylate, glycerin, and small 
quantities of thymol and oil of peppermint. 
CERATUM RESINJE COMPOSITl 31. 
Compoiiiid Rosin Cerate. 
Composed of rosin, yellow wax, suet, turpentine, and linseed oil. 
For formula and method of preparation see U. S. Pharmacopoeia. 
Minor changes in the constituents, not however affecting the strength 
of the active ingredients, have been made in all the cerates with the 
exception of Ceratum Resinjc. 
Ceratum Cantharidis, for instance, should no longer have the odor 
of oil of turpentine. 
CHLORALFOR3IA3IIDU3r. 
Cliloralforinamide. 
CCl3.CH(OH)NH.COH 
Chloralum formamidatum (P. G.). Also known as CldwaJamidt^ a 
name which, because it is both inaccurate and misleading (being prop- 
erK applied to another substance), should not be used. 
Chemistry. — It is formed b}" the direct union of anh^Mrous chloral 
and formamide, as shown by the following reaction: 
H 
OH 
NHHCC 
Chloral Formamide Chloralformamide 
H 
CCl 3 C< q+HCONH, - CCI 3 O 
Properties. — Colorless, lustrous ciwstals, odorless, and having a some- 
what bitter taste. 
