rosinin
Rosin, also known as colophony or Greek pitch, is a solid form of resin obtained from the sap of live coniferous trees, most notably pines. It is typically produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. The remaining material is a brittle, amorphous solid, usually yellowish to amber in color.
Rosin is soluble in many organic solvents, including alcohol, ether, benzene, and chloroform. Its primary uses
Historically, rosin had numerous applications, including as a waterproofing agent for ropes and sails and as