It is the natural resin materials, it's chemical composition is for C2OH3OO2O. It is widely used in paintings, paper marking, soap, rubber, chemical industry, pharmaceutical industry, etc.
Gum rosin is a kind of natural resin, that composed of various kinds resin acids, and having special physical and chemical properties. It is an important raw material for the manufacture of adhesive, coating, inks, rubber, soaps, paper etc.