turpentine

Turpentine
IUPAC name	not applicable
Identifiers
CAS number	8006-64-2 Y
SMILES	not applicable (see [1])
Properties
Molecular formula	C10H16 (approximate)
Molar mass	136 g/mol (approximate)
Density	0.85-0.87 g/cm³ (approximate)
Melting point	< −50 °C (approximate)
Boiling point	150-170 °C
Hazards
MSDS	http://www.sciencelab.com/xMSDS-Turpentine-9925375
Main hazards	flammable
NFPA 704	3 1 0
Flash point	35 °C
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Turpentine (also called spirit of turpentine, oil of turpentine, wood turpentine, gum turpentine, and white spirit) is a fluid obtained by the distillation of resin obtained from trees, mainly pine trees. It is composed of terpenes, mainly the monoterpenes alpha-pinene and beta-pinene. It is sometimes known colloquially as turps, but this more often refers to turpentine substitute (or mineral turpentine).

The word turpentine derives (via French and Latin) from the Greek word terebinthine, the name of a species of tree, the terebinth tree, from whose sap the spirit was originally distilled.^[1]

Production

One of the earliest sources was the terebinth or turpentine tree (Pistacia terebinthus), a Mediterranean tree related to the pistachio.

Important pines for turpentine production include: Maritime Pine (Pinus pinaster), Aleppo Pine (Pinus halepensis), Masson's Pine (Pinus massoniana), Sumatran Pine (Pinus merkusii), Longleaf Pine (Pinus palustris), Loblolly Pine (Pinus taeda) and Ponderosa Pine (Pinus ponderosa).

Turpentine distilled from the California pines such as Ponderosa Pine (Pinus ponderosa) and Gray Pine (Pinus sabiniana) yield a form of turpentine that is almost pure Heptane.^[2]

When producing chemical wood pulp from pines with the Kraft process, turpentine is collected as a byproduct. Often it is burned at the mill for energy production.

Industrial and other end uses

1912 postcard depicting turpentine harvesters

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 Its industrial use as a solvent in industrialized nations has largely been replaced by the much cheaper turpentine substitutes distilled from crude oil.

Canada balsam, also called Canada turpentine or balsam of fir, is a turpentine which is made from the resin of the balsam fir.

Venice turpentine is produced from the Western Larch Larix occidentalis.

Turpentine is also used as a source of raw materials in the synthesis of fragrant chemical compounds. Commercially used camphor, 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 and triterpenes 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.^[3]

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).

In 1946 Soichiro Honda used turpentine as a fuel for the first Honda motorcycles as gasoline was almost totally unavailable following World War II.^[4]

Hazards

Turpentine is an organic solvent, and thus poses many of the same hazards as do other such substances. Its vapor can irritate the skin and eyes, damage the lungs and respiratory system, as well as the central nervous system when inhaled, and cause renal failure when ingested, among other things. It is extremely flammable.

Medicinal elixir

Turpentine and petroleum distillates such as coal oil and kerosene have been used medicinally since ancient times, as topical and sometimes internal home remedies. Topically it has been used for abrasions and wounds, as a treatment for lice, and when mixed with animal fat it has been used as a chest rub, or inhaler for nasal and throat ailments. Many modern chest rubs, such as the Vicks variety, still contain turpentine in their formulations. Taken internally it was used as treatment for intestinal parasites because of its alleged antiseptic and diuretic properties, and a general cure-all^[5][6] as in Hamlin's Wizard Oil. Sugar, molasses or honey were sometimes used to mask the taste. Internal administration of these toxic products is no longer common today.

Turpentine was a common medicine among seamen during the Age of Discovery, and one of several products carried aboard Ferdinand Magellan's fleet in his first circumnavigation of the globe.^[7]

See also

• Mineral turpentine
• Patent medicine
• White spirit

References

1. ^ Barnhart, R.K. (1995). The Barnhart Consise Dictionary of Etymology. New York: Harper Collins. ISBN 0062700847. 
2. ^ http://www.henriettesherbal.com/eclectic/usdisp/pinus_tere_oleu.html
3. ^ Charles H. Haswell. "Reminiscences of New York By an Octogenarian (1816 - 1860)". http://www.jmisc.net/octo/octo-17.htm. 
4. ^ "Honda History". http://smokeriders.com/History/Honda_History/body_honda_history.html. 
5. ^ "Rural Life in the United States: Home Remedies". American Memory Timeline. The Library of Congress. 2002. http://memory.loc.gov/learn/features/timeline/riseind/rural/remedies.html. Retrieved 2008-02-22. 
6. ^ Delbert Trew (15 June2007). "Coal Oil was Useful All-Purpose Home Remedy". Texas Escapes. Blueprints For Travel, LLC.. http://www.texasescapes.com/DelbertTrew/Coal-Oil-Home-Remedy.htm. Retrieved 2008-02-22. 
7. ^ Laurence Bergreen (2003). "Over the edge of the world : Magellan's terrifying circumnavigation of the globe". http://lccn.loc.gov/2003050143. Retrieved 2009-09-14. 

External links

• IPCS INCHEM Turpentine classification, hazard, and property table
• Gum naval stores: Turpentine and rosin from pine resin
• Florida State Archive photographs of turpentine camps and laborers
• Timber and Turpentine Industries