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CAS number 60-01-5 YesY
PubChem 6050
ChemSpider 5827 YesY
ChEBI CHEBI:35020 YesY
Jmol-3D images Image 1
Molecular formula C15H26O6
Molar mass 302.36 g mol−1
Appearance Oily liquid with bitter taste[1]
Density 1.032 g/cm3[1]
Melting point −75 °C (−103 °F; 198 K)[1]
Boiling point 305 to 310 °C (581 to 590 °F; 578 to 583 K)[1]
Solubility in water Insoluble[1]
MSDS Tributyrin MSDS, Fischer Scientific
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Butyrin, also known as tributyrin, is a triglyceride naturally present in butter. It is an ester composed of butyric acid and glycerol.[1] Among other things, it is used as an ingredient in making margarine. It is present in butter and can be described as a liquid fat with an acrid taste.

Tributyrin is also used in microbiological laboratories to identify the bacterium Moraxella catarrhalis. [2]

Tributyrin is a stable and rapidly absorbed prodrug of butyric acid which enhances antiproliferative effects of dihydroxycholecalciferol in human colon cancer cells.[3]


  1. ^ a b c d e f Budavari, Susan, ed. (1996), The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (12th ed.), Merck, ISBN 0911910123 
  2. ^ Pérez, José L.; Angeles Pulido; Florencia Pantozzi; Rogelio Martin (October 1990). "Butyrate esterase (4-methylumbelliferyl butyrate) spot test, a simple method for immediate identification of Moraxella (Branhamella) catarrhalis corrected" (PDF Reprint). Journal of Clinical Microbiology (Washington, DC: American Society for Microbiology) 28 (10): 2347–2348. ISSN 1098-660X. PMC 268174. PMID 2121784. 
  3. ^ Gaschott, Tanja; Dieter Steinhilber; Vladan Milovic; Jürgen Stein (June 2001). "Tributyrin, a Stable and Rapidly Absorbed Prodrug of Butyric Acid, Enhances Antiproliferative Effects of Dihydroxycholecalciferol in Human Colon Cancer Cells". The Journal of Nutrition (Bethesda, MD: The American Society for Nutritional Sciences) 131 (6): 1839–1843. ISSN 1541-6100. PMID 11385076. Retrieved 2009-08-17.