Palmitic Acid

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Related to hexadecanoic acid: octadecanoic acid, oleic acid, heptadecanoic acid

palmitic acid

[päl′mid·ik ′as·əd]
(organic chemistry)
C15H31COOH A fatty acid; white crystals, soluble in alcohol and ether, insoluble in water; melts at 63.4°C, boils at 271.5°C (100 mmHg); derived from spermaceti; used to make metallic palmitates and in soaps, waterproofing, and lubricating oils.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Palmitic Acid

 

CH3(CH2)14COOH, a monobasic saturated carboxylic acid; colorless crystals. Melting point, 63.1°C; boiling point, 351.5°C. Palmitic acid is insoluble in water and moderately soluble in alcohol, benzene, and acetone. Along with stearic acid, it is the most widely distributed saturated fatty acid in nature, occurring as an ester of glycerol in nearly all the known natural fats. The average palmitic acid glyceride content in palm oil is 32–40 percent; in butter, 25 percent; in bean oil, 6.5 percent; and in pork fat, 30 percent. Esters of palmitic acid and higher alcohols form waxes; for example, the cetyl ester of palmitic acid is the principal constituent of spermaceti wax, and the myricyl ester is the main component of beeswax. Coenzyme A is involved in the biosynthesis and metabolism of palmitic acid.

Palmitic acid is usually isolated by rectification or fractional recrystallization from acid mixtures that are obtained through the saponification of fats. Certain palmitic acid esters are used in the manufacture of detergents and cosmetics. Palmitic acid salts, along with the salts of certain other carboxylic acids, are classified as detergents. In combination with stearic acid, palmitic acid is a constituent of stearin.

V. N. FROSIN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The most predominant compounds were pherophorbide a, pheophorbide a', pyropheophorbide a, methyl pyropheophorbide a, hexadecanoic acid, oleic acid, linoleic acid, linolenic acid, campesterol, stigmasterol, and [beta]-sitosterol.
From GC-MS analyses, bioactive extracts that show significant antidepressant activity contain fatty acid or esters such as methyl ester of hexadecanoic acid, n-hexadecanoic acid, methyl ester of 9-Octadecenoic acid (Z), Methyl stearidonate, Heneicosane, 16,17-Epoxyandrostane, Triacontane, Diisooctyl phthalate, Tetracosane; steroidals such as Stigmast-4-en-3-one, Squalene and [beta]-Sitosterol; and phenolics such as 2-Methoxy-4-vinylphenol, 3,4-Dimethoxy-6-methylpyrocatechol, 4-(3-hydroxy-1-propenyl)-2-methoxy-Phenol.
These can be further discussed as the total composition (34.734%) of compounds from stigmastane-3,6-dione, (5.alpha.), hexadecanoic acid, and stigmast-4-en-3-one has the ability of antimicrobial properties when compared to major components of acetone solvent extracts.
Palmitic acid (hexadecanoic acid; a saturated fattyacid) is commonly found in animals, plants and microorganisms.
In general, secondary metabolites produced by infected oil palm were relatively higher for tolerant progenies, P4 and P5, namely benzoic acid, methyl ester; hexadecanoic acid, methyl ester; 9,12-octadecadienoic acid (Z,Z)-, methyl ester and 9-octadecenoic acid (Z)-, methyl ester.
Components Amount (%) S- ASR ASR 1 Butylphthalide 4.35 2.47 2 Pentadecane, 8-heptyl- 0.29 -- 3 Z-Butylidenephthalide 8.79 4.61 4 b-Eudesmol 0.13 -- 5 E-Butylidenephthalide 0.15 0.11 6 Senkyunolide A 3.14 2.43 7 Muurola-4,11-diene 0.14 0.08 8 Z-Ligustilide 49.8 41.5 9 1-Nonadecene 0.56 0.36 10 Cryptone 0.58 0.31 11 3,9-Diethyl-6-tridecanol 0.21 0.14 12 5-(2-Thienyl)-4-pyrimidinamine 0.19 0.13 13 g-Eudesmol 0.27 0.10 14 E-Ligustilide 8.30 4.55 15 6,7-Dihydroxyligustilide 0.12 0.09 16 Senkyunolide F 0.18 0.10 17 Hexadecanoic acid 0.01 -- 18 Senkyunolide H 0.12 0.04 19 Senkyunolide I 0.38 0.13 20 1-Octadecanol 0.20 -- 21 Methoxsalen 0.22 0.12 22 Marmesin 0.21 -- 23 Lomatin 0.70 0.53 (a) RRI: Related retention indices calculated against n-alkanes.
The analysis of bioactive compounds by GC-MS confirmed the presence of acetic acid hexadecanoic acid citric acid 9-octadecenoic acid as the major membrane-active antibacterial compounds.Copyright 2014 Friends Science Publishers.
1,2, benzendicarboxylic acid (5.39%), phthalic acid (1.99%), butanoic acid (0.35%), hexadecanoic acid (0.29%), propanoic acid (0.15%), 9-octadecenamide (0.13%), benzene acetic acid (0.09%) and 4-(1-1-dimethyl ethyl)-methyl acetate (0.08%) (Fig.
These five main components were identified as cis-9-hexadecenoic acid (0.65%), hexadecanoic acid (16.34%), cis-9, cis-12-octadecenoic acid (27.53%), cis-9-octadecenoic acid (47.30%), and octadecanoic acid (8.17%).
The wax biosynthesis starts with hexadecanoic acid and long chain fatty acids with an even carbon number are produced by elongation.
Compound sawdust sawdust 1 Hexanoic acid 0.5 0 2 Octanoic acid 0.4 2.2 3 Nonanoic acid 1.1 6.7 4 Decanoic acid 0 0 5 Dodecanoic acid 0.6 0 6 Tetradecanoic acid 0.9 4.6 7 Hexadecanoic acid 43.9 190.5 8 Heptadecanoic acid, anteiso 36.2 57.2 9 Octadecanoic acid 12.7 67.3 10 9-Octadecenoic acid 93.9 1,598.0 11 9, 12-Octadecadienoic acid 29.2 418.2 12 9, 12, 15 Octadecatrienoic acid 12.6 141.3 13 Docosanoic acid 16.5 39.7 14 Pimaric acid 77.7 1,253.5 15 Isopimaric acid 105.9 583.8 16 Abietic acid 77.9 2,426.1 17 Dehydroabietic acid 727.2 5,291.5 18 7-Oxodchydroabietic acid 172.6 986.3 Table 4.