We offer acidviolet49commercial name acidviolet4bscolour index no. 42640physical appearance yellowish green powderpurity 100 %concentration of spectrosolution 0.001 % maximum absorption at wave length 0.4887 at549nminsolubility in hot water +- 1 %solubility at 80'c 40 gmsltrmoisture content less than 1 %usage liquid blue, wool, silk, leather etc