Fee a te) es Agee are wt ee 
LEGUMINOSZ. oe OS 
sparingly soluble in alcohol, more freely soluble in amylic 
alcohol, ether, collodion, chloroform, and various hydrocarbons. 
It is inodorous, and, on account of its insolubility in water, 
tasteless. Chrysarobin dissolves in concentrated sulphuric 
acid with a yellow colour, is nearly insoluble in very diluted 
_ potassa solution, and yields with melted potassa a brown mass. 
Chrysophanic acid, on the other hand, dissolves in concentrated 
sulphuric acid and in very dilute potassa solution with a red 
colour, and on evaporation to dryness of a solution in alkali a 
Violet or blue colour is produced. The solution of chrysarobin 
in strong potassa solution has a yellow colour and a strong 
green fluorescence, and on being agitated with air rapidly 
acquires a red colour, through the formation of chrysophanic 
acid; C5°H%6Q7 (chrysarobin) + 20% yields 20'°H'°0% 
;: (chrysophanic acid) + 3H?0. 
Tests—If boiled with 2000 parts of water, chrysarobin 
should not be completely dissolved ; the filtrate should be pale 
reddish-brown, tasteless, neutral to test-paper, and should not 
' be coloured by ferric chloride. Chrysarobin should be almost 
_ wholly soluble in 150 parts of hot alcohol. If a minute frag- 
ment of chrysarobin be added to a drop of fuming nitric. 
acid, the red solution extended to a thin layer, and a little 
ammonia added a violet colour should be produced.—P. G. 
(Stillé and Maisch.) According to Allen, the Chrysophante 
acid of commerce is an indefinite mixture of the acid and 
chrvsarobin. It is stated to be liable to adulteration with 
picric acid and other yellow colouring matters. 
Commerce.—Araroba is now very largely imported into India 
and is sold under the names of Chrysarobine, Ararobine, and 
Goa Powder. Messrs. Kemp & Oo. inform us that they 
import about a ton annually. 
CASALPINIA PULCHERRIMA, Swarte, 
Fig,— Bot. Mag. t. 995; Rheede, Hort. Mal. vi.,t-1. Small — 
Gold Mohar (Hng.), Fleur de paon, Haie fleurie (/r-). 
4 —s 
