Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound
Stearic acid (/ˈstɪərɪk/STEER-ik, /stiˈærɪk/stee-ARR-ik) is a saturated fatty acid with an 18-carbon chain.[9] The IUPAC name is octadecanoic acid.[9] It is a soft waxy solid with the formula CH3(CH2)16CO2H.[9] The triglyceride derived from three molecules of stearic acid is called stearin.[9] Stearic acid is a prevalent fatty-acid in nature, found in many animal and vegetable fats, but is usually higher in animal fat than vegetable fat. It has a melting point of 69.4 °C (156.9 °F) °C and a pKa of 4.50.[11]
Its name comes from the Greek word στέαρ "stéar", which means tallow. The salts and esters of stearic acid are called stearates.[9] As its ester, stearic acid is one of the most common saturated fatty acids found in nature and in the food supply, following palmitic acid.[12][13] Dietary sources of stearic acid include meat, poultry, fish, eggs, dairy products, and foods prepared with fats; beef tallow, lard, butterfat, cocoa butter, and shea butter are rich fat sources of stearic acid.[9][12]
^Susan Budavari, ed. (1989). Merck Index (11th ed.). Rahway, New Jersey: Merck & Co., Inc. p. 8761. ISBN 978-0-911910-28-5.
^ abcdefghLide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
^ abRalston, A.W.; Hoerr, C.W. (1942). "The Solubilities of the Normal Saturated Fatty Acids". The Journal of Organic Chemistry. 7 (6): 546–555. doi:10.1021/jo01200a013. PMID 20280727.
^ abcSeidell, Atherton; Linke, William F. (1919). Solubilities of Inorganic and Organic Compounds (2nd ed.). D. Van Nostrand Company. p. 677.
^ abOctadecanoic acid 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) (retrieved 2014-06-15)
^Vargaftik, Natan B.; et al. (1993). Handbook of Thermal Conductivity of Liquids and Gases (illustrated ed.). CRC Press. p. 318. ISBN 978-0-8493-9345-7.
^ abcdvon Sydow, E. (1955). "On the structure of the crystal form B of stearic acid". Acta Crystallographica. 8 (9): 557–560. Bibcode:1955AcCry...8..557V. doi:10.1107/S0365110X55001746.
^ abcdefg"Stearic acid". PubChem, US National Library of Medicine. 29 April 2023. Retrieved 5 May 2023.
^Loften, J.R.; Linn, J.G.; Drackley, J.K.; Jenkins, T.C.; Soderholm, C.G.; Kertz, A.F. (August 2014). "Invited review: Palmitic and stearic acid metabolism in lactating dairy cows". Journal of Dairy Science. 97 (8): 4661–4674. doi:10.3168/jds.2014-7919. ISSN 0022-0302. PMID 24913651.
^ abHunter, J. E.; Zhang, J.; Kris-Etherton, P. M. (2009). "Cardiovascular disease risk of dietary stearic acid compared with trans, other saturated, and unsaturated fatty acids: A systematic review". American Journal of Clinical Nutrition. 91 (1): 46–63. doi:10.3945/ajcn.2009.27661. PMID 19939984.
^Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra "The Lipid Handbook with Cd-Rom. 3rd ed. Boca Raton: CRC Press, 2007. ISBN 0849396883 | ISBN 978-0849396885
Stearicacid (/ˈstɪərɪk/ STEER-ik, /stiˈærɪk/ stee-ARR-ik) is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It...
shay; Bambara: sìtulu ߛߌ߮ߕߎߟߎ) is a fat (triglyceride; mainly oleic acid and stearicacid) extracted from the nut of the African shea tree (Vitellaria paradoxa)...
fatty acids. For the common fatty acids of the C18 variety, desaturases convert stearicacid into oleic acid. Other desaturases convert oleic acid into...
Sodium stearate (IUPAC: Sodium Octadecanoate) is the sodium salt of stearicacid. This white solid is the most common soap. It is found in many types of...
stearicacid is dehydrogenated to give the monounsaturated derivative, oleic acid. Oleic acid undergoes the typical reactions of carboxylic acids and...
monounsaturated oleic acid in each triglyceride. The predominant triglycerides are POS, SOS, and POP, where P = palmitic, O = oleic, and S = stearicacid residues...
Saturated fatty acids are fatty acids that make up saturated fats. List of unsaturated fatty acids Carboxylic acid List of carboxylic acids Dicarboxylic acid...
indicate the fatty acid: stearin derived from stearicacid, triolein derived from oleic acid, palmitin derived from palmitic acid, etc. These compounds...
fatty acids have no C=C double bonds. They have the formula CH3(CH2)nCOOH, for different n. An important saturated fatty acid is stearicacid (n = 16)...
Glycol distearate is the diester of stearicacid and ethylene glycol. It is mostly commonly encountered in personal care products and cosmetics where it...
A more recent study reported presence of ergometrine, lysergol, lysergic acid and other alkaloids that contribute to its pharmacological effects. While...
acids. The C16 and C18 omega hydroxy acids 16-hydroxy palmitic acid and 18-hydroxy stearicacid are key monomers of cutin in the plant cuticle. The polymer...
Sorbitan monostearate is an ester of sorbitan (a sorbitol derivative) and stearicacid and is sometimes referred to as a synthetic wax. Sorbitan monostearate...
Carboxylic acids are organic acids characterized by a carboxyl (-COOH) functional group. The naming of these compounds is governed by IUPAC nomenclature...
the latter. A second problem is that the stearicacid makes the paper brittle. Lastly, both the stearicacid and the wax will be prone to efflorescence...
also released a line of Giant Parma Violets. Ingredients include sugar, stearicacid, modified starch, glucose syrup, and anthocyanin. The petals of violets...
consisting of salt containing two equivalents of stearate (the anion of stearicacid) and one magnesium cation (Mg2+). Magnesium stearate is a white, water-insoluble...
dietary intake of total saturated fats, palmitic acid, and stearicacid. Dietary lauric acid and myristic acid, present in plant oils and also in dairy fat...
organic compound with the molecular formula C20H40O3. It is the ester of stearicacid and ethylene glycol. It is used as an ingredient in many types of personal...
contains a monounsaturated fatty acid (MUFA), a subclass of fatty acid characterized by having a double bond in the fatty acid chain with all of the remaining...
and stearicacid with the chemical formula C 18H 35KO 2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid. Potassium...
change in fatty acid composition - that is about 6% palmitic acid, 2-3% stearicacid, 15-18% linoleic acid, and 30-33% linolenic acid. Oils from Maritime...
palmitic acid and 9,16- or 10,16-dihydroxypalmitic acid. The C18 family consists mainly of 18-hydroxy oleic acid, 9,10-epoxy-18-hydroxy stearicacid, and...
pantothenic acid, sodium, and potassium (table). Major fatty acids in pumpkin seeds are linoleic acid and oleic acid, with palmitic acid and stearicacid in lesser...