78 CHEMISTRY OF ROTTLERINE. 



1858. satiny lustre. This substance has been named by Dr. Anderson 

 Rottlerine. 



Characters. Dr. Anderson states that Rottlerine is insoluble in water, 



of Rottlermc. S p ar j n giy so luble in cold alcohol, more so in boiling. In ether, 



it is readily soluble. It dissolves in an alkaline solution with 



a dark-red colour. Its alcoholic solution is not precipitated by 



acetate of lead. 



Bromine instantly decolorizes it, with formation of a sub- 

 stitution-product, which dissolves readily in spirit, and is 

 thrown down by the addition of water. This compound does 

 not crystallize, and could not be obtained in a state of purity. 

 Nitric acid oxidizes Eottlerine, forming at first a yellow resinous 

 matter, and by longer continued action a quantity of oxalic 

 acid. Concentrated sulphuric acid in the cold dissolves it with 

 a yellow colour, which, on the application of a gentle heat, 

 becomes first red, and finally very dark, sulphurous acid being 

 evolved. Heated on platinum it fuses into a yellow fluid, 

 which decomposes at a higher temperature, giving off pungent 

 fumes and leaving a bulky charcoal. 



Analyses of The mean result of four analyses gave the composition of 



Kottierine. as 



Calculation. 



Carbon . . . 69112 6947 C 22 132 

 Hydrogen . . 5'550 5-26 H^ 10 



Oxygen . . . 25.333 25-27 O 6 48 



99-995 100-00 190 



The attempts made to confirm this formula have not led to 

 any definite result, Rottlerine forming no compound with the 

 metallic oxides, and that with bromine not having been obtained 

 sufficiently definite. 



A concentrated alcoholic solution of Kamala deposits upon 

 cooling a pale flocculent matter, sometimes in such abundance 

 as completely to fill the fluid. This substance is soluble in 

 boiling alcohol, but sparingly in cold ; hardly soluble in ether, 

 and insoluble in water. It appears to have no crystalline 



