Sell gum rosin @Spain

Gum rosin is composed of various kinds resin acids, and having special physical and chemical properties.Gum rosin is made of natural resin, its general formula is C20H30O2.Gum rosin also called colophony, is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. It is semi-transparent and varies in color from yellow to black. At room temperature rosin is brittle, but it melts at stove-top temperatures. It chiefly consists of different resin acids, especially abietic acid.

Post by Mario Velaquez sanchez    Chemicals    @2012-11-23 17:24:39