Ceryl cerotate

Chinese wax is a white to yellowish-white, gelatinous, crystalline, water-insoluble substance obtained from the secretion of the scaled insect Coccus ceriferus, common in China and India. Chinese wax is used chiefly in the manufacture of polishes, sizes, and candles and is traditionally employed in Chinese medicine. It is basically made up of ceryl cerotate (esacosanoyl esacosanoate) and esacosanol [78,79]. 

Chinese insect wax. A wax secreted on the leaves of plants in China by a louselike insect. Its chief ingredient is ceryl cerotate. 

Chinese Wax. The excretion of an insect. Coccus ceriferus Fabr., or C. pela Westwood, deposited on the twigs and branches of a species of ash tree in Western China. Chief constituent is ceryl cerotate. 

The composition of hpids on the surface of leaves, stems, and fruits is quite different from that of hpids that form intracellular membranes. Their role is the protection of sensitive plant tissues against the loss of water and other biologically important volatiles. Waxes (i.e., esters of FA with monofunctional alcohols) are the most important components of these lipids. Some plant waxes are of commercial importance, such as camauba or candellila wax. They are solid at room temperature and in temperate climates, with the exception of liquid jojoba wax, and are plastic or even liquid in tropical climates. They contain bound saturated long-chain FA and alcohols. Waxes on the surface of apples and other fruits from temperate zones are solids or semisolid pastes, consisting of terpenes, ceryl cerotate, ceryl palmitate, and other esters. In the wax from lettuce leaves, higher alcohols prevail, with only small amounts of free FA (Bakker et al., 1998). Other components, such as alkanes, ketones, esters, secondary alcohols, were detected in other vegetables (e.g., in kale or rutabaga). 

The role of waxes is to protect the surface of plant leaves, stems and seeds from dehydration and infections by microorganisms. Waxes are removed together with oils by solvent extraction of nondehulled seeds. Waxes are oil-soluble at elevated temperatures but crystalhze at room temperature, causing undesired oil turbidity. Ceryl cerotate (ceryl alcohol esterified with cerotic acid, C25H51COOH)... 

Alcohols are usually esterified with fatty acids of similar structure. The characteristic structure is expressed by formula 3-42. The compound name is formed by the radical names of the alcohol and the bound acid. For example, ceryl cerotate is the ester of cerotic acid with ceryl alcohol. The main wax ester on the surface of sunflower seeds is ceryl cerotate. The main surface wax esters of apples and cabbage leaves are ceryl palmitate and ceryl stearate. The constituents of the epicuticular wax of apple fruits are also Cig-C26 fatty acid esters of (E)- and (Z)-p-coumaryl alcohol. The fatty acid esterification occurs at the y-hydroxyl group rather than at the 4-hydroxyl on the phenyl ring. 

Another animal wax is beeswax, which is used by honey bees to build honeycomb cells in which their larvae are raised and honey and poUen are stored. Its major component is ceryl cerotate (3-42), but a diverse mix of its homologues is also present. The basic composition of animal waxes is shown in Table. 3.21. 

Chinese wax Ceroplastes ceriferus Ceryl lignocerate, montanyl lignocerate, melissyl lignocerate, ceryl cerotate, ceryl montanate. Candles, polishes, lubricant, Chinese traditional medicine... 

A. Gascard, Ceryl alcohol and cerotic acid of Chinese wax, Comptes Rendue, 170, 1326 1328 (1920). 

Chinese insect wax Insects (Coccus ceriferus) in Asia secrete this was on branches of ash and evergreen trees. The wax is scraped off and refined. It is composed of cerotic acid ester of ceryl alcohol with some free alcohols and hydrocarbons... 

Ccepryn, in H-00209 Celidoniol, see N-00005 Celidonione, see N-00006 >Cellocidin, in B-00042 >Cepacol, in H-00209 Cerane, see H-00128 Cerinic acid, see H-00131 Cerotic acid, see H-00131 >Ccrulenin, C-00012 Ceryl iodide, see 1-00059 >Cetab, in H-00210 Cetalkonium, see B-00003 Cetalkonium chloride, in B-00003 Cetane, see H-00164 Cetoleic acid, in D-00206 >Cetrimide, in H-00210 Cetrimonium, see H-00210 >Cetrimonium bromide, in H-00210 >Cetyl alcohol, see H-00169... 

Carnauba (Brasii, paim) Cerotic Ceryl alcohol, myricyl alcohol... 

Sheiiack Cerotic, iacceric Ceryl alcohol, lacceryl alcohol... 

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