246 



LEGUMINOS.E 



odorless; taste sweetish and astringent. The powder is of a brownish- 

 red color. 



Powder. Elements of: See Part iv, Chap. I, B. 



CONSTITUENTS. Kino-tannic acid (colored black-green by ferric salts, 

 in neutral solution; violet by ferrous salts), kinoin, neutral crystal- 



FIG. 132. Plerocarpus marsupium Branch. 



line prisms, pyrocatechin, kino-red, pectin, and ash. Ash, not 

 ceeding 3 per cent. 



ex- 



Preparation of Kinoin. Boil kino with dilute HC1 and agitate clear solution 

 with ether. Evaporate off the ether. Heating this to 266P., an insoluble 

 amorphous kino-red is obtained. 



Pyrocatechin results from the dry distillation of kino, or is obtained by treating 

 Jdno with ether. 



ACTION AND USES. A powerful astringent. Dose: 8 to 30 gr. (0.5 to 



2 Gm.). 

 OFFICIAL PREPARATION. 



Tinctura Kino (5 per cent.), Dose: i to 2 fl. dr (4 to 8 mils). 



