Trimyristin

Trimyristin is an ester with the chemical formula C45H86O6. It is a saturated fat which is the triglyceride of myristic acid. Trimyristin is a white to yellowish-gray solid that is insoluble in water, but soluble in ethanol, benzene, chloroform, dichloromethane, and ether.

Trimyristin[1]
Names
IUPAC name
1,3-Di(tetradecanoyloxy)propan-2-yl tetradecanoate
Other names
Glyceryl trimyristate; Glycerol tritetradecanoate;[2] 1,2,3-Tritetradecanoylglycerol[3]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.008.273
EC Number
  • 209-099-7
UNII
Properties
C45H86O6
Molar mass 723.177 g·mol−1
Appearance White-yellowish gray solid
Odor Odorless
Density 0.862 g/cm3 (20 °C)[4]
0.8848 g/cm3 (60 °C)[2]
Melting point 56–57 °C (133–135 °F; 329–330 K)
at 760 mmHg[2][4][5]
Boiling point 311 °C (592 °F; 584 K) at 760 mmHg[2]
Solubility Slightly soluble in alcohol, ligroin
Soluble in diethyl ether, acetone, benzene,[2] dichloromethane, chloroform
1.4428 (60 °C)[2]
Structure
Triclinic (β-form)[3]
P1 (β-form)[3]
a = 12.0626 Å, b = 41.714 Å, c = 5.4588 Å (β-form)[3]
α = 73.888°, β = 100.408°, γ = 118.274°
Thermochemistry
1013.6 J/mol·K (β-form, 261.9 K)
1555.2 J/mol·K (331.5 K)[5][6]
1246 J/mol·K (liquid)[6]
Std enthalpy of
formation (ΔfH⦵298)
 −2355 kJ/mol[6]
Std enthalpy of
combustion (ΔcH⦵298)
 27643.7 kJ/mol[6]
Hazards
NFPA 704 (fire diamond)
Flash point > 110 °C (230 °F; 383 K)[7]
421.1 °C (790.0 °F; 694.2 K)[7]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Occurrence

Trimyristin is found naturally in many vegetable fats and oils.

Isolation from nutmeg
Seed of nutmeg contains trimyristin

The isolation of trimyristin from powdered nutmeg is a common introductory-level college organic chemistry experiment.[8][9][10] It is an uncommonly simple natural product extraction because nutmeg oil generally consists of over eighty percent trimyristin. Trimyristin makes up between 20-25% of the overall mass of dried, ground nutmeg. Separation is generally carried out by steam distillation and purification uses extraction from ether followed by distillation or rotary evaporation to remove the volatile solvent. The extraction of trimyristin can also be done with diethyl ether at room temperature, due to its high solubility in the ether. The experiment is frequently included in curricula, both for its relative ease and to provide instruction in these techniques.

See also

References
  1. Merck Index, 11th Edition, 9638.
  2. Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
  3. Van Langevelde, A.; Peschar, R.; Schenk, H. (2001). "Structure of β-trimyristin and β-tristearin from high-resolution X-ray powder diffraction data". Acta Crystallographica Section B. 57 (3): 372. doi:10.1107/S0108768100019121.
  4. Sharma, Someshower Dutt; Kitano, Hiroaki; Sagara, Kazunobu (2004). "Phase Change Materials for Low Temperature Solar Thermal Applications" (PDF). Res. Rep. Fac. Eng. Mie Univ. Mie University. 29: 31–64. Retrieved 2014-06-19.
  5. Charbonnet, G. H.; Singleton, W. S. (1947). "Thermal properties of fats and oils". Journal of the American Oil Chemists' Society. 24 (5): 140. doi:10.1007/BF02643296.
  6. Trimyristin in Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD), http://webbook.nist.gov (retrieved 2014-06-19)
  7. "MSDS of Trimyristin". fishersci.ca. Fisher Scientific. Retrieved 2014-06-19.
  8. Frank, Forrest; Roberts, Theodore; Snell, Jane; Yates, Christy; Collins, Joseph (1971). "Trimyristin from nutmeg". Journal of Chemical Education. 48 (4): 255. doi:10.1021/ed048p255.
  9. Vestling, Martha M (1990). "Isolation of trimyristin and cholesterol: Two microscale extractions for one laboratory period". Journal of Chemical Education. 67 (3): 274. doi:10.1021/ed067p274.
  10. De Mattos, Marcio C. S; Nicodem, David E (2002). "Soap from Nutmeg: An Integrated Introductory Organic Chemistry Laboratory Experiment". Journal of Chemical Education. 79: 94. doi:10.1021/ed079p94.


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