Alumens of хромокалиевые those 2833300000
Crystalline substance. has a ruby-red color, when the temperature of the solution rises, it acquires a green color, after cooling, after a lapse of time, it acquires a violet color. Potassium chromium alum, due to its ability to cause protein denaturation, is used for tanning leather and as a mordant in the textile industry.
Due to its specific nature, alum must be stored in a dry and ventilated place, always packed in paper or plastic bags.