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 . UM of Strychnia or Strychnine. Strychnia Nitrate. Colorless, transparent, flexible needles of a silky lustre;when heated upon platinum-foil, they become slightly yellow,melt, and are finally wholly d
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 . UM of Strychnia or Strychnine. Strychnia Nitrate. Colorless, transparent, flexible needles of a silky lustre;when heated upon platinum-foil, they become slightly yellow,melt, and are finally wholly dissipated (evidence of the absenceof fixed admixtures). Strychnia nitrate is soluble in 60 parts of cold, and in threeparts of boiling, water; it is also soluble in dilute alcohol andin chloroform, but only sparingly in strong alcohol, and almostinsoluble in absolute alcohol, and in ether: Its solutions areneutral, and have an intensely bitter taste. Strychnia nitrate answers to all the reactions of strychnia,and may be recognized by the characteristic coloration withstrong sulphuric acid and potassium bichromate or permanga-nate, as described on page 355. The evidence of being a nitratemay readily be obtained by decolorization, when its solution isfaintly blued with sulphuric-acid indigo-solution, and heated,or by dissolving a few grains of the salt, and an equal quantity. Fig. 93. of ferrous sulphate, in a little diluted sulphuric acid, and placingthe colorless solution upon concentrated sulphuric acid (Fig. 358 MANUAL OF CHEMICAL ANALYSIS. 93); a dark-brown coloration will take place at tlie junction ofthe two liquids. The methods for testing the purity of strychnia nitrate arethe same as described with strychnia, on pages 355, 356. Itneeds only to be added that the salt should not emit ammo-iiiacal odors, when heated with liquor potafcsse, nor cause therise of white vapors, when a glass rod, moistened with aceticacid, is held over the orifice of the test-tube. STRYCHNIiE SU
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