Turpentine is not a pure substance but a complex mixture of terpenes, particularly large proportion of pinene (bicyclic monoterpenic hydrocarbon), a compound from which camphor is manufactured. Terpene is a class of naturally occurring unsaturated hydrocarbons whose carbon skeletons are composed exclusively of isoprene C5 units (CH2=C(CH3)-CH=CH2). The stepwise distillation with water and carbonates yields terpenes. The water solubility of turpentine oil is negligible. But it is miscible in absolute alcohol and ether. It boils at about 155 - 185 C and its specific gravity is ranged from 0.86 to 088. It dissolves sulphur, phosphorus and resins.

 

The two primary uses of turpentine in industry are as a solvent and as a source of materials for organic synthesis.

As a solvent, turpentine is used for thinning oil-based paints, for producing varnishes, and as a raw material for the chemical industry. Its industrial use as a solvent in industrialized nations has largely been replaced by the much cheaper turpentine substitutes distilled from crude oil.

 

Turpentine is also used as a source of raw materials in the synthesis of fragrant chemical compounds. Commercially usedcamphor, linalool, alpha-terpineol, and geraniol are all usually produced from alpha-pinene and beta-pinene, which are two of the chief chemical components of turpentine. These pinenes are separated and purified by distillation. The mixture of diterpenes andtriterpenes that is left as residue after turpentine distillation is sold as rosin.

 

Turpentine is also added to many cleaning and sanitary products due to its antiseptic properties and its "clean scent".

In early 19th-century America, turpentine was sometimes burned in lamps as a cheap alternative to whale oil. It was most commonly used for outdoor lighting, due to its strong odor. A blend of ethanol and turpentine added as an illuminant called burning fluid was also important for several decades.

 

Turpentine has long been used as a solvent, mixed with beeswax or with carnauba wax, to make fine furniture wax for use as a protective coating over oiled wood finishes (e.g., lemon oil).

 

Source:http://apihimal.org

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