Oleic acid is a monounsaturated fatty acid found in various animal and vegetable sources. It has the empirical formula C₁₈H₃₄O₂. Its IUPAC name is cis-9-octadecenoic acid, and its lipid shorthand name is 18:1 cis-9. The saturated form of this acid is stearic acid.

The dominant use of oleic acid is as its sodium salt, which a major component of many kinds of soap. Small amounts of oleic acid are used as an excipient in pharmaceuticals, oleic acid is used as an emulsifying or solubilizing agent in aerosol products. For more information click here.

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