Manual of chemical analysis as applied to the examination of medicinal chemicals : a guide for the determination of their identity and quality, and for the determination of their identity and quality, and for the detection of impurities and adulterations : for the use of pharmaceutists, physicians, druggists, and manufacturing chemists, and of pharmaceutical and medical students . ted, it remains unchanged with hydrochloricacid, gives a reddish-brown solution with nitric acid, remain-ing limpid and brown on dilution with water; it is freely dis-solved, with a violet color, by hot sulphuric aci
Manual of chemical analysis as applied to the examination of medicinal chemicals : a guide for the determination of their identity and quality, and for the determination of their identity and quality, and for the detection of impurities and adulterations : for the use of pharmaceutists, physicians, druggists, and manufacturing chemists, and of pharmaceutical and medical students . ted, it remains unchanged with hydrochloricacid, gives a reddish-brown solution with nitric acid, remain-ing limpid and brown on dilution with water; it is freely dis-solved, with a violet color, by hot sulphuric acid; upon dilu-tion, however, the color disappears, and the iodoform is sepa-rated again in small yellow scales. It is not acted upon bythe aqueous solutions of the alkaline hydrates, but their alco-holic solutions dissolve and decompose it, forming alkalineiodide and formiate. lODUM. 243 I0DTJ3SI. lODINUM. Heavy, brilliant, crystalline plates or scales, of an opaquebluish-black appearance and imperfect metallic lustre, and of apeculiar odor, resembling faintly that of chlorine. Its specificgravity is ; it melts at 107 C, and boils at 175° C.; itis, however, slowly volatile at common temperatures. Whenheated in a dry tube (Fig. 74), iodine melts and rises in deepviolet vapors, which condense in the cooler parts of the tube tosmall, brilliant Fid. 74. Iodine is but sparingly soluble in water, requiring 5,524parts of it at 12° C, and imparting to it a faint yellowish is more soluble in glycerin, 100 parts of which dissolve alittle more than 1|- part of iodine. It is also soluble to someextent in the aqueous solutions of certain salts, as for instanceof ammonium chloride and nitrate. Aqueous solutions of hy-driodic acid and of the alkaline iodides and bromides, dissolveiodine freely, as do also alcohol and ether, with a reddish-browncolor, benzol and chloroform with a violet-red, and carbon bi- 244 MANUAL OF CHEMICAL ANALYSIS. sulphide wi
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