PROPYL

ALCOHOLS (C3H7OH)  . Two compounds of this formula exist as explained in the article ALCOHOLS . Normal propyl alcohol, CH3•CH2•CH2.OH, was obtained in 1853 by G . C . B . Chancel, by submitting fusel oil to fractional distillation . It may be prepared by any of the methods applicable to primary alcohols . It is an agreeable-smelling liquid; boiling at 97.40 C., and miscible with water in all proportions . It cannot be separated from water by fractional distillation, since it forms a mixture of constant boiling point (see DISTILLATION) . Oxidation converts it into propionic acid . It is distinguished from ethyl alcohol by its insolubility in a cold saturated calcium chloride solution . Iso-propyl alcohol (CH3)2CHOH, was obtained by M .

P . E .

Berthelot in 1855 by heating the addition compound of propylene and sulphuric acid with water, and in 1862 by C . Friedel by the reduction of acetone . It is a colourless liquid boiling at 82.7° C .