Sentence Examples


  • Soc., 18 9 8, 73, p. 35 2) as a colourless liquid by the addition of hydroxylamine hydrochloride to an aqueous solution of formaldehyde in the presence of sodium carbonate; the resulting solution was extracted with ether and the oxime hydrochloride precipitated by gaseous hydrochloric acid, the precipitate being then dissolved in water, the solution exactly neutralized and distilled.
  • Jour., 1860, 158, p. 146); by heating aniline for red with nitrobenzene, concentrated hydrochloric acid and iron (Coupier, Ber., 1873, 6, p. 423); or by condensing formaldehyde with aniline and ortho-toluidine and oxidizing the mixture.
  • Nicotine may be recognized by the addition of a drop of 30% formaldehyde, the mixture being allowed to stand for one hour and the solid residue then moistened by a drop of concentrated sulphruic acid, when an intense rose-red colour is produced (I.
  • The original hypothesis of Baeyer suggested that the course of events is the following: the carbon dioxide is decomposed into carbon monoxide and oxygen, while water is simultaneously split up into hydrogen and oxygen; the hydrogen and the carbon monoxide unite to form formaldehyde and the oxygen is exhaled.
  • The formation of formaldehyde has till recently not been satisfactorily proved, though it has been obtained from certain leaves by distillation.
 

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