The appearance is dark red amorphous powder ,it can be dissolvedin water and alcohol solution easily, but not in oil .the powercan't absorb moisture and can't form solid. Color of solutionchanges when PH is different ,The color charging form orange-red tored-pueple to aubergine to blue when PH is between1-8.The color of solution(in an acidic medium)can not

fade under light for a long time,and also has good resistance tohigh temperature ,the color can nt change with long time

boling.