PRACTICAL ORGANIC CHEMISTRY
urate. Now add a slight excess of Fehling's solution and boil for
several minutes: reduction occurs with the precipitation of cuprous
Reduction of potassium permanganate.
To a solution of uric acid
in aqueous Na
solution drop by drop: a brown
precipitate of MnO
is produced immediately in the cold.
Section 25, Halogeno-hydrocarbons.
Table XXVI, p. 559)
Methyl iodide, ethyl bromide, ethyl iodide, higher alkyl halides, chloro-
carbon tetrachloride, chlorobenzene, bromobenzene,
iodobenzene, benzyl chloride
(and nuclear substituted derivatives)
All heavier than, and insoluble in water. All
liquids, except iodoform, CHI
, which is a yellow crystalline solid with
a characteristic odour. The remainder are colourless liquids when
pure: ethyl iodide, C
I, and iodobenzene, C
I, are, however,
usually yellow or even brown in colour. Methyl iodide, CH
Br, ethyl iodide, chloroform,* CHCl