Alcohols, analysis cetyl

Chem. Descrip. Petrolatum, hydrog. lanolin, hydrog. coconut oil, sorbitan sesquioleate, stearyl alcohol, and cetyl alcohol Chem. Analysis 0,3% max. moisture... 

This equation was solved by iterative computer regression analysis (9) using the data of the conductometric titration of 0,6% aqueous hexadecyltrimethylammonium bromide solutions with the different hexadecyltrimethylammonium bromide-cetyl alcohol molar ratios shown in Figure 2. Table I gives the results of this analysis. 

Chevreul discovered butyric acid, capric and caproic acids, and valeric acid (delphinic or phocenic acid) in dolphin and porpoise fats, and later in the berries of the Viburnum opulus. He proposed to call spermaceti cetine (Kijrasy whale). On heating it with caustic potash he found that it formed a salt of an acid he had found in other fats (really palmitic acid), but instead of glycerine he obtained a new neutral substance which he later called ethal (from the first syllables of the words ether and alcohol ), and from an analysis concluded that it is a compound of ethylene (hydrog ne percarbure) and water. Dumas and Peligot showed that it is cetyl alcohol, C16H34O. 

Another measure of entanglement spacing is, of course. Me, the critical value for the influence of entanglements on steady flow viscosity. It also varies with dilution in a manner that can be determined from careful analysis of the dependence of viscosity on molecular weight and concentration, though data of high accuracy are required. Studies of polyfvinyl acetate) in diethyl phthalate and cetyl alcohol and polystyrene in dibenzyl ether, as well as other systems reviewed by Berry and Fox, ° support the expectation that Me, like Me, is proportional to njMe = M z, where M% is the value for the undiluted polymer. (A slight difference in the concentration dependences of Me and Me, probably too small to detect experimentally, has been predicted by Kelley and Bueche. )... 

At the end of the transformation, acetic anhydride in excess is hydrolyzed in acetic acid, which is directly titrated in the reaction medium with a sodium hydroxide solution in the presence of phenolphthalein. The same operations are realized with a blank in which there is no hydroxylated derivative, all the other experimental conditions being the same as in the assay. The difference between both volumes added gives the number of moles of acetic acid used for the esterification. The in pyridine acetylation index is of great interest in the analysis of essential vegetable oils, fats, and numerous pharmaceutical compounds, including, for instance, the determinations of cetylic and benzylic alcohols. The propionyl index is based on the same principle, but all of the operations are performed in a nonaqueous medium. 

Chem. Descrip. Cetyl alcohol Chem. Analysis 60-80% C16 16-26% Cl 8 CAS 124-29-8 EINECS/ELINCS 253-149-0 Uses Surfactant Regulatery JP approved... 

Chem. Desrxip. Oleyl alcohol/cetyl alcohol Chem. Analysis 0.1% max. water... 

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