Stearic acid purified

Purified Stearic Acid Stearyl Alcohol Terpin Hydrate... 

Stearic Acid Purified Stearic Acid Method V NF (19, p. 2525)... 

Fatty-acids, salts and esters Aluminum monostearate, calcium stearate, ethyl oleate, isopropyl myristate, isopropyl palmitate, magnesium stearate, oleic acid, polyoxyl 40 stearate, proprionic acid, sodium stearate, stearic acid, purified stearic acid, and zinc stearate... 

The USPNE 23 describe stearic acid as a mixture of stearic acid (CigHagOa) and palmitic acid (C16H32O2). In the USPNE 23, the content of stearic acid is not less than 40.0% and the sum of the two acids is not less than 90.0%. The USPNF 23 also contains a monograph for purified stearic acid see Section 17. The PhEur 2005 contains a single monograph for stearic acid but defines stearic acid 50, stearic acid 70, and stearic acid 95 as containing specific amounts of stearic acid (C18H36O2) see Section 9. 

Calcium stearate magnesium stearate polyoxyethylene stearates purified stearic acid zinc stearate. 

Comments The USPNF 23 describes purified stearic acid as a mixture of stearic acid (Ci8H3g02) and palmitic acid (C16H32O2), which together constitute not less than 96.0% of the total content. The content of Ci8H3g02 is no less than 90.0% of the total. 

Potassium bisulfite Potassium myristate Potassium propionate Powdered fructose Propan-1-ol (S)-Propylene carbonate Propylparaben potassium Propylparaben sodium Purified bentonite Purified stearic acid Quaternium 18-hectorite Rapeseed oil Refined almond oil Refined olive-pomace oil... 

Heptadecylamine from Stearic Acid. To a solution of 15 g. (0.53 mole) of purified stearic acid (m.p. 69.5 ) in 500 cc. of benzene, 30 cc. of concentrated sulfuric acid is added and the mixture stirred vigorously at 40°. One and two-tenths moles of hydrazoic acid (52 cc. of a 5.3% solution in benzene) is then added slowly. After the reaction has ceased (about two hours), the acid layer is poured into water to precipitate the sulfate of heptadecylamine, which may be crystallized from ethanol as white plates that turn brown at 195° and decompose at 200°. The yield is 96%. 

Immerse for 10 min in coating bath of 1.0 g purified stearic acid dissolved in 95—99 mL of acetone and 1—5 mL of nitric acid... 

Guidon, P.T.J. Hightower, L.E. (1986). The 73 kD heat shock cognate protein purified from rat brain contains nonesterified palmitic and stearic acids. J. Cell. Physiol. 128,239-245. 

In order to obtain stearone with the highest melting point, the checkers found it necessary to purify the above recrystallized stearic acid by converting it to the methyl ester and fractionat-... 

Benzene solutions of lignoceric (CH3(CH2)->2COOH) and stearic (CH3(CH2)i6COOH) acids with concentrations of 1 X 10 3 and 3 x 10-3 mol-L1, respectively, were spread on the pure water surface atTsp of 293 K. Since Tsp is below Tm of the lignoceric acid (Tm - 347 K) and the stearic acid (Tm =317 K) monolayers [31] those monolayers are in a crystalline state. The subphase water was purified with the Milli-QII system. The lignoceric acid monolayer was prepared at a surface pressure of 5 mN-m 1 by a continuous compression at a rate of 1.7 X 10 3 nm--molecule 1 s 1. The stearic acid monolayer was prepared at 23 mN-m-1 by the continuous compression method or the multi-step creep method [39]. The multi-step creep method is a monolayer preparation method for which the monolayer is stepwisely compressed up to a... 

As shown in Table 1, the acyl moiety of cardiolipin is comprised almost entirely of unsaturated fatty acids. Other membrane phospholipids such as phosphatidyl choline and phosphatidyl ethanolamine contain 1(M0 mol of saturatedfatty acids such as palmitic acid (Ci6 0) and stearic acid (Ci8 0) per 100 mol of total fatty acids. In particular,linoleic acid (Cl8 2) is the most abundant polyunsaturated fatty acid consisting of 80 mol%, linolenic acid (Cl8 3) 8 mol%, and oleic acid (Ci8 i) 6 mol%. Therefore, by using a commercially available cardiolipin purified from bovine heart mitochondria, we characterized auto-oxidation products by reverse phase HPTLC and reverse phase HPLC. 

Stearic acid (octadecanoic acid). [57-11-4] M 284.5, m 71.4°. Crystd from acetone, acetonitrile, EtOH (5 times), aq MeOH, ethyl methyl ketone or pet ether (b 60-90°), or by fractional pptn by dissolving in hot 95% EtOH and pouring into distd water, with stirring. The ppte, after washing with distd water, was dried under vacuum over P2O5. It has also been purified by zone melting. [Tamai et al. JPC 91 541 1987]. 

Stearic acid is manufactured by hydrolysis of fat by continuous exposure to a countercurrent stream of high-temperature water and fat in a high-pressure chamber. The resultant mixture is purified by vacuum steam distillation and the distillates are then separated using selective solvents. 

Tin (powder) [7440-31-5] M 118.7. Tin powder is purified by adding it to about twice its weight of 10% aqueousNaOH and shaking vigorously for lOminutes. (This removes oxide film and stearic acid or similar material that is sometimes added for pulverisation.) It is then filtered, washed with water until the washings are no longer alkaline to litmus, rinsed with MeOH and dried in air. [Sisido et al. J Am Chem Soc 83 538 1961.]... 

The 12-nitroxide stearic acid and the 8-nitroxide methyl palmitate were donated by J. D. Morrisett (John Baylor College of Medicine, Houston, Tex.). All other nitroxide stearic acid and stearate probes were purchased from Syva (California). All probe molecules were subsequently purified by preparative thin layer chromatography (TLC) until a single spot was obtained under all development conditions. TLC was carried out in a dry nitrogen atmosphere to avoid possible oxidation or hydrolysis during purification. Ultrapure silica gel, free from any plasticizers, was used to avoid possible further contamination. 

A9-desaturase is generally considered as a lipogenic enzyme. It catalyses the introduction of a A9 double bound on the acyl-chain of saturated fatty acids such as palmitic acid, which can be produced by FAS. The hepatic A9-desatur-ase is well-known (Heinemann and Ozols, 2003) since it has been purified more than 30 years ago (Strittmatter et al., 1974). This A9-desaturase acts on both palmitic acid (C16 0) and stearic acid (C18 0) to produce pamitoleic acid (C16 ln-7) and oleic acid (C18 ln-9) respectively (Fig. 1.1). Under normal dietary conditions. Cl6 1 n-7 and C18 ln-9 are the main fatty acids of the n-7 and n-9 families in animals. 

HC1 in a white cream base of purified water USP, propylene glycol dicaprylate, glycerin USP, cetyl alcohol NF, glyceryl monostearate SE, white petrolatum USP, stearic acid NF, polyoxyethylene cetyl ether, benzyl alcohol NF, diethanolamine NF, and sodium benzoate NF. 

The topical lotion contains clindamycin phosphate USP at a concentration equivalent to 10 mg clindamycin per milliliter. The lotion contains cetostearyl alcohol (2.5%), glycerin, glyceryl stearate SE (with potassium monostearate), isostearyl alcohol (2.5%), methylparaben (0.3%), sodium lauroyl sarcosinate, stearic acid, and purified... 

Cream 0.05%, ointment 0.05%, and lotion 0.05% contain desonide (Pregna-1,4-diene-3,20-dione, 11,21 -dihydroxy-16, 17-[(l-methylethylidene)bis(oxy)]-,[ll(beta),16(alpha)-]), a synthetic nonfluorinated corticosteroid, for topical dermatologic use. The corticosteroids constitute a class of primarily synthetic steroids used topically as anti-inflammatory and antipruritic agents. Each gram of cream contains 0.5 mg of desonide in a base of purified water, emulsifying wax, propylene glycol, stearic acid, isopropyl palmitate, synthetic beeswax, polysorbate 60, potassium sorbate,... 

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