Ethyl palmitate

C12 to C20, primarily Ci6 to ( is), used as surface lubricants in the manufacture of food-contact articles. The method, which uses ethyl palmitate (Eastman Chemicals No. 1575 Red Label) as an internal standard, has been validated at 200 ppm total FAME [185]. Other FAME standards (methyl palmitate, methyl stearate, methyl oleate, methyl linoleate and methyl linolenate) are available (Applied Science Laboratories) [116], Worked out examples of additive determinations are given in the Food Additives Analytical Manual [116], which also describes a great many of indirect food additives, such as BHA, BHT, TBHQ, l-chloro-2-propanol, DLTDP, fatty acid methyl esters, w-heptyl-p-hydroxybenzoate, propyl-gallate, sodium benzoate, sodium stearoyl-2-lactylate, sorbitol and phenolic antioxidants. EPA methods 606 and 8060 describe the CGC separation of phthalate esters (direct injection) (cf. Figure 4.2). 

Larva Inhibits worker ovarian development Ten component blend of brood pheromone methyl ethyl palmitate 78 79, stearate 80 81, oleate 56 90,linoleate 82 83, linolenate 84 84a, specifically ethyl palmitate methyl linolenate [121,122]... 

Dibutyltartrate is a solv plasticizer for NC, DuPont (Ref 2) obtd a patent for the use of Dibutyltartrate as a constituent of pro-plnts which produce no flash from the gun barrel. An example of such a compn is NC, DNT ester of an org acid, such as dialkyl phthalate, dibutyltartrate or ethyl palmitate Refs 1) Beil 3, 518, (178), [332] 1021 ... 

Figure 3. Mixed monolayers of cholesterol-ethyl palmitate system at 23.5°C. and pH 6...

Eight binary systems are reported. Six include cholesterol as one component of the mixed film. The second components in these six films were myristic acid, methyl palmitate, ethyl palmitate, 1,2-dimyristin, 1,2-dimyristoyl-3-lecithin, and l,2-didecanoyl-3-lecithin. In addition, the systems trilaurin-dimyristoyl lecithin and triolein-dimyristoyl lecithin... 

Fatty acid esters Ethyl acetate, methyl methacrylate, trimethylolpropane trimethacrylate, decyl methacrylate, 2-hydroxyethyl methacrylate, ethoxy ethyl acetate, methyl palmitate, ethyl palmitate, isopropyl palmitate, butyl palmitate, isobutyl palmitate, methyl margarate, butyl margarate, methyl stearate, ethyl stearate, butyl stearate, isobutyl stearate, methyl oleate, bis(2-ethylhexyl) adipate, bis(2-ethylhexyl) sebacate, methyl linoleate, methyl laurate, octyl laurate, methyl myristate, isobutyl myristate, butyl myristate, dihydroisopimaric add methyl ester... 

Another difference between bulk and monolayer oxidations was observed in the amounts of alkanes and alkenes produced. In bulk, the alkanes in ethyl palmitate heated for 1 hr at 180°C were greater than the 1-alkenes, indicating that hydrogen abstraction is the preferred route for termination of the alkyl radicals which are formed by hydroperoxide scission. The reverse was true in the ordered state. Restriction of the alkyl radicals limits abstraction of hydrogen from other substrate molecules to form alkanes thus favoring the production of 1-alkenes (Hau, L. B. Nawar, W. W. University of Massachusetts, Amherst, unpublished data). 

Kumar, R., G. Madras and J. Modak, Enzymatic Synthesis of Ethyl Palmitate in Supercritical Carbon Dioxide, Industrial Engineering Chemistry Research, 43, 1568-1573 (2004). 

With ethyl palmitate there is a long region of fairly small slope, nearly straight, in the place of the constant vapour-pressure region of the liquid-expanded type of films. As the temperature is raised, or the length of the hydrocarbon chain shortened, the vapour-expanded films become less like the liquid-expanded and more like the gaseous films. 

It was proposed by the duPont Co(Ref 3) to prepare flashless smokeless proplnts from NC DNT, in which is incorporated ethyl palmitate or other esters of organic acids insol in water but forming a gelatinous mass with NC DNT at about 80°... 

Which do you think is the more soluble in water, sodium palmitate or ethyl palmitate In benzene ... 

Fig. 12. Ethyl palmitate films when the molecules are nearly independent. The ester groups are fully exposed to the water, and alkaline hydrolysis is rapid, k = 0.037 min. (Alexander and Schulman, 18).

Alexander and Rideal (30) found that the hydrolysis of a monolayer of ethyl palmitate on alkali became unusually slow as the reaction proceeded. They suggested that the reason for this decrease in rate lay in a reduced concentration of hydroxyl ions at the surface due to repulsion by the negative charge upon the interface, for which the palmitate ions formed in the saponification were responsible. 

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