The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 305
llowed tostand. The colour-base crystallises out and is filtered. The base is dissolved ina small quantity of water and dilute hydrochloric acid, and the solution allowedto cool, when the hydrochloride separates out, and is filtered, and dried on aporous plate. Properties.—Green crystals, easily… … + H20 (phthalic anhydride). (the phthalein).]f - Hp O
Dyes and dyeing
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