palmitin


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palmitin

(păl`mətĭn), fat that is the triglyceridetriglyceride,
ester formed from glycerol and one to three fatty acids. Fats and oils are triglycerides. In a simple triglyceride such as palmitin or stearin, all three fatty-acid groups are identical.
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 of palmitic acid, CH3(CH2)14CO2H, i.e., the tripalmitate ester of glycerol. It is a white crystalline solid at ordinary temperatures, insoluble in water but soluble in ethanol and ether. When it is heated with an alkali (a process called saponification), a soapsoap,
a cleansing agent. It cleanses by lowering the surface tension of water, by emulsifying grease, and by absorbing dirt into the foam.

Ancient peoples are believed to have employed wood ashes and water for washing and to have relieved the resulting irritation with
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 is produced. Palmitin and other palmitate esters occur abundantly in palm oil, lard, and tallow and also in olive oil, cottonseed oil, and butter—in fact, in most fats and oilsfats and oils,
group of organic substances that form an important part of the diet and also are useful in many industries. The fats are usually solid, the oils generally liquid at ordinary room temperatures.
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