Dimer acid is a light yellow or yellow, viscous, non-toxic, transparent liquid. Its molecular formula is C36H68O4. Its CAS number is 61788-89-4. Dimer acids are primarily used to synthesize polyamide resins and hot melt adhesives.
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Dimer acids, also known as dimerized fatty acids, are dicarboxylic acids that are made by dimerizing unsaturated fatty acids obtained from tall oil, oleic acid, canola, or cottonseed oil, generally on clay catalysts. Dimer acids are also used in the manufacture of alkyd resins, adhesives, surfactants, as fuel oil additives, and lubricant.