catechol ( pyrocatechin, pyrocatechol )
A colorless crystal (C 6 H 6
O 2 ), soluble in water, alcohol,
ether, benzene, and alkalis. An alkaline solution
gives a coloration with ferric chloride, which
turns brown on standing in air. It can be obtained
fromCATECHU , a
natural dye, or prepared by fusing
orthobenzenedisulfonic acid with caustic soda.
Catechol is the principal constituent of the
condensed (catechol) tannins. See also: VEGETABLE TANNINS .
(235 , 306 )
all CoOL documents]
Timestamp: Saturday, 19-Nov-2011 13:18:39 PST
Retrieved: Tuesday, 16-Jul-2019 00:06:51 GMT