What is sebacic acid? What role does sebacic acid play in plasticizers?

[Alias]Sebic acid, octanedicarboxylic acid, suberic acid.

［Molecular Formula］C10H18O4

［Structural Formula］HOOC(CH2)8COOH

[Properties]Sebacic acid appears as white scaly or needle-like crystals, with a relative density of 1.207 (25℃) and a melting point of 134.5℃ , boiling point 294.5℃ (13.3kPa), refractive index 1.422 (133.3℃). Decarboxylation temperature is 350-370℃. Can sublime when heated to melting point. The industrial product is a white powder with a slight fatty acid smell. It is slightly soluble in water and easily soluble in organic solvents such as ethanol and ether. Because it contains two carboxyl groups, it can generate two series of salts, esters, amides and other natural products. It is present in castor oil. middle.

[Use]Organic synthesis raw material, used to synthesize diethyl sebacate, dibutyl sebacate, and sebacic acid Ester plasticizers such as dinonyl ester, dioctyl sebacate, and glyceryl sebacate. Also used in the manufacture of nylon-610 and nylon-9 fibers. It is also an intermediate for manufacturing polymers such as polyamide, polyester, and polyurethane. It is also used in the manufacture of high-temperature lubricants, surfactants, epoxy resin curing agents, artificial flavors and cosmetics, etc. It can also be used as cross-linking agent for powder coatings, polyethylene modifier, etc.

[Brief preparation method]

①Add alkali to hydrolyze castor oil to form sodium ricinoleate soap, add sulfuric acid to acidolyze to form ricinoleic acid, then add cresol and alkali to form disodium sebacate , after acid neutralization, sebacic acid monosodium salt can be obtained, and then sebacic acid can be obtained by acid precipitation with sulfuric acid.

②Produced by fermentation of n-decane in petroleum.

[Safety and Protection]Packed in woven bags lined with plastic bags, with a net weight of 25kg, 40kg, 45kg or 50kg per bag. Store and transport according to the regulations for flammable products, and store in a cool and dry place.

This product is of low toxicity, but inhalation of dust can irritate the respiratory system.