Camphor.—A solid concrete substance, Laurus camphor or Indian laurel tree, which grows in the East Indies, China and Japan. Soluble in alcohol, ether, oil and acetic acid.
Chloride of Antimony.—See antimony, chloride of.
Chloride of Mercury.—Called corrosive sublimate, which see.
Chloride of Iron.—See muriate of iron.
Copal.—The concrete juice of a tree growing in South America and the East Indies. Strictly speaking, it is not a gum or a resin, but rather resembles amber. It may be dissolved by digestion in linseed oil with heat little less than sufficient to boil the oil. The solution, diluted with oil of turpentine, forms a transparent varnish. It also dissolves in ether, and the ethereous solutions may be mixed with alcohol.
Copperas.—Sulphate of iron or green vitriol. A salt made by the decomposition of iron or iron pyrites in oil of vitriol. Dissolved in water, is the basis of black dyes, and is used in making ink, &c.
Copper, Sulphate of.—Called blue vitriol, which see.
Corrosive Sublimate.—Chloride of mercury. A salt prepared by the decomposition of sulphate of mercury by common salt. It is a deadly poison. It is soluble in alcohol, ether, in two or three parts of hot water and in about 15 parts cold water. It melts and sublimes about 600°. The white of eggs is an antidote for the poison.
Damar or Dammar.—A gum obtained from the agathis or dammar tree, allied to the pine trees, growing in the East Indies. It is soluble in alcohol and in oil of turpentine.
Dragon’s Blood.—The inspissated juice of various plants, of a red color, used for tinging varnishes, tooth tincture, staining marble, &c.