Pristane

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Pristane
Skeletal formula of pristane
Identifiers
CAS number 1921-70-6 YesY
PubChem 15979
ChemSpider 15182 YesY, 24531975 6R,10R YesY, 21428537 6R,10S YesY, 24531981 6S,10S YesY
EC number 217-650-8
MeSH pristane
ChEBI CHEBI:53181 YesY
RTECS number RZ1880000
Beilstein Reference 1720538
Jmol-3D images Image 1
Properties
Molecular formula C19H40
Molar mass 268.52 g mol−1
Appearance Colorless liquid
Odor Odorless
Density 783 mg mL−1
Melting point −100.0 °C; −147.9 °F; 173.2 K
Boiling point 296 °C (565 °F; 569 K)
Refractive index (nD) 1.438
Thermochemistry
Specific
heat capacity
C
569.76 J K−1 mol−1
Hazards
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word WARNING
GHS hazard statements H315
EU classification Irritant Xi
R-phrases R36/38
S-phrases S26, S36
Flash point >110 °C
Related compounds
Related alkanes
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

Pristane is a natural saturated terpenoid alkane obtained primarily from shark liver oil, from which its name is derived (Latin pristis, "shark"). It is also found in the stomach oil of birds in the order Procellariiformes and in mineral oil and some foods.[2]

It is a transparent oily liquid that is immiscible with water, but soluble in diethyl ether, benzene, chloroform and carbon tetrachloride.

Pristane is known to induce autoimmune diseases in rodents. It is used in research to understand the pathogenesis of rheumatoid arthritis and lupus.[3][4]

It is used as a lubricant, a transformer oil, an immunologic adjuvant, and an anti-corrosion agent, biological marker, plasmocytomas inducer and in production of monoclonal antibodies.

Biosynthetically, pristane is derived from phytol and is used as a biomarker in petroleum studies.[5] Tocopherols represent an alternate sedimentary source of pristane in sediments and petroleum.[6]

References[edit]

  1. ^ "pristane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. 
  2. ^ Chung, J. G., L. R. Garrett, P. E. Byers, and M. A. Cuchens (1989). "A survey of the amount of pristane in common fruits and vegetables". J. Food Comp. Anal. 2 (22): 22. doi:10.1016/0889-1575(89)90058-6. 
  3. ^ Anderson, P. N., and M. Potter (1969). "Induction of plasma cell tumours in BALB-c mice with 2,6,10,14-tetramethylpentadecane (pristane)". Nature 222 (5197): 994–5. doi:10.1038/222994a0. PMID 5789334. 
  4. ^ Hazani R, Engineer N. (Nov 2008). "Surreptitious injection of mineral oil: a case report of sclerosing lipogranulomatosis". Ann Plast Surg 61 (5): 555–8. doi:10.1097/SAP.0b013e31816d8316. PMID 18948786. 
  5. ^ Hunt, J. (2002). "Early developments in petroleum geochemistry". Organic Geochemistry 33: 1025–1052. doi:10.1016/S0146-6380(02)00056-6.  edit
  6. ^ Goossens H., J.W. de Leeuw, P.A. Schenck, and S.C. Brassell (1984). "Tocopherols as likely precursors of pristane in ancient sediments and crude oils". Nature 312 (5993): 440–442. doi:10.1038/312440a0.