This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
Kino. - The inspissated juice of Pterocarpus Marsupium Roxburgh (nat. ord. Leguminosae).
Small, angular, dark brownish-red, shining pieces, brittle, in thin layers ruby red and transparent, inodorous, very astringent and sweetish, tingeing the saliva deep red.
The chief constituents are - (1) Kinotannic Acid, C18 H18O8, 75 per cent. (2) Kinoin, a crystalline neutral principle. (3) Pyro-catechin, C6H4(Oh2), a substance also found pathologically in the urine, and giving it a dark color. It reduces blue copper solutions. (4) Kino red, formed from kinotannic acid by oxidation. (5) Gum.
Incompatibles. - Mineral acids, alkalies, all metallic salts, carbonates, and gelatin.
Dose, 5 to 30 gr.; .30 to 2.00 gm.
Kinotannic acid acts like tannic acid, and therefore kino is a powerful astringent. It is used in astringent gargles, and also in diarrhoea mixtures.