| Title:  Araroba CAS Registry Number:  1393-64-2 Additional Names:  Goa powder;  crude chrysarobin;  Brazil powder;  ringworm powder;  "Arariba" Literature References:  Found in cavities in the trunk of Andira araroba, Aguiar (Vouacapoua araroba [Aguiar] Lyons), Leguminosae and freed as much as possible from fragments of wood.  Habit.  In damp forests of Brazil and Bahia.  Constit.  About 50% chrysarobin; chrysophanic acid, gum, about 2% resin, ararobinol¾said to be the methyl ether of emodin. Properties:  Brown-yellow, slightly cryst, rough, odorless powder; becomes brownish on exposure to air. Therap-Cat:  Dermatologic.  |