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 . res 1,000 grains. The cylin-der is then closed, agitated,and immersed in tepid water,of about 50 C, for half anhour, the stopper being tightlyfitted as soon as the expansionof the liquid, caused by thewarmth, allows
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 . res 1,000 grains. The cylin-der is then closed, agitated,and immersed in tepid water,of about 50 C, for half anhour, the stopper being tightlyfitted as soon as the expansionof the liquid, caused by thewarmth, allows it; it is thenset aside for 12 hours, when thefluid will have separated intotwo layers, a lower one of chlo-roform and an upper, more orless red-colored, ammoniacalaqueous solution of ammoniumformiate. If the sample was pure hy-drate, the chloroform shouldmeasure not less than 235grains, equal to grainsby weight, and per cent,of the chloral hydrate em-ployed; if it was chloral alcoholate, the chloroform will meas-ure about 200 grains, equal to 299 grains by weight, and per cent, of the chloral alcoholate. An admixture of the alcoholate with the chlorate will there-fore be indicated, proportionately, by the decrease of the quan-tity of chloroform, ranging, in the above test, between 235 and200 grain-measures by volume, and and 299 grains byweight. 12. Fia. 5C. 178 MANUAL OF CHEMICAL ANALYSIS. CHLOROF ORMUM. CHLOROFORMIUM. Chloroform, A dense, colorless, volatile, and limpid liquid, of an agree-able, ethereal, aromatic odor and sweetish taste ; it does notact upon litmus, and is not readily inflammable, but, when awick is saturated with chloroform, and ignited, it burns with agreenish flame, emitting pungent vapors which contain hydro-chloric acid. It is very volatile at common temperatures, pro-ducing, by rapid evaporation, great cold, and leaving neither aresidue, nor a fllm of moisture, nor any unpleasant odor, whenwholly evaporated by the warmth of the
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