This section is from the book "A Text Book Of Materia Medica, Being An Account Of The More Important Crude Drugs Of Vegetable And Animal Origin", by Henry G. Greenish. Also available from Amazon: A Text Book of Materia Medica : Being an Account of the More Important Crude Drugs of Vegetable and Animal Origin.
Butea gum is the juice obtained by incising the stem of Butea frondosa, Roxburgh (N.O. Leguminosoe), dried.
The drug usually occurs in small, irregular, angular fragments to one side of which dull, buff coloured portions of the cortex and cortex of the stem sometimes adhere. When fresh it is ruby-red, transparent in small fragments, and brittle; but on keeping it becomes dull, nearly black, opaque and tough. It is readily reduced to a reddish powder and has an astringent taste. It is partially soluble in water and in alcohol.
The chief constituent is kinotannic acid (15 to 62 per cent.); the insoluble matter may vary from 10 to 46 per cent.
Similar to those of kino.