Extractable volatile oils, from pine tree

Derivation From pine trees, chiefly Pinus palustris and Pinus caribaea. (1) Gum rosin is the residue obtained after the distillation of turpentine oil from the oleoresin tapped from living trees. (2) Wood rosin is obtained by extracting pine stumps with naphtha and distilling off the volatile fraction. (3) Tail-oil rosin is a by-product of the fractionation of tall oil. 

The isoprene molecules are usually (though not always) joined head-to-tail. The simplest terpenes (monoterpenes) are the chief constituents of the essential volatile oils obtained from the sap and tissues of certain plants and trees. These have been used in the manufacture of perfumes from earliest times. In particular, the monoterpenes extracted from pine trees, or obtained as by-products in paper pulp manufacture, have been used for many years as paint solvents (Chapter 9) and anti-oxidants (Chapter 10). 

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