This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
Guttapercha-Guttapercha.-The concrete juice of Isonandra gutta. A native of Borneo, Sumatra, and other Eastern islands.
Characters and Tests.-In tough flexible pieces, of a light brown or chocolate colour. Soluble or nearly soluble in chloroform, yielding a more or less turbid solution.
Composition.-Guttapercha contains 80 per cent. of a hydrocarbon gutta, salts, volatile oil, fat, colouring matter, and two bodies named alban and fluavil.