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Stearic acid In-depth analysis
In-depth analysis
English product name: Stearicacid products alias: octadecadienoic acid; octadecanoic acid
Molecular formula: CH3 (CH2) 16COOH
CAS No. :57 -11-4
Toxicity protection: This product is non-toxic quality standards: GB9103-88
Physical and chemical properties: Pure product is white soft small pieces with shiny. Melting point of 69.6 ℃. The boiling point of 376.1 ° C (decomposition). The relative density of 0.9408 (20/4 ° C). The refractive index nD (80 ° C) 1.4299. 90 ~ 100 ° C, slowly volatile. Slightly soluble in cold water, stearic acid
Soluble in alcohol, acetone, soluble in benzene, chloroform, ether, carbon tetrachloride, carbon disulphide, amyl acetate and toluene. Industrial products were white or light yellow granule or block, the mixture of stearic acid and palmitic acid, and contains a small amount of oleic acid, slightly fatty odor.
Usage: mainly used as additives raw materials and household chemical products, raw materials.
Stearic acid formula CH3 (CH2) nCOOH its main ingredients for hexadecenoic 18 carbon unsaturated acid, the appearance of white or white waxy or crystalline solids, soluble in ethanol, ether, chloroform, carbon disulfide and other solvents, insoluble in water.
Preparation or sources
Industrial production of oil hydrolysis.
Stearic acid in the form of glycerides tallow imitation, oil and some vegetable oils, these oils by hydrolysis derived stearic acid.
Stearic acid is a fatty acid nature widespread, almost all the oils have varying concentrations of stearic acid, with higher levels of animal fat content of up to 24%, such as butter, vegetable oil content of less 0.8%, tea, palm oil 6%, but the content is as high as 34% cocoa butter.
Production methods for industrial stearic acid fractionation and press. Hardened oil decomposition agent, and then hydrolysis of crude fatty acids, and then washed, distillation, decolorization is finished. Byproduct glycerol.

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