Isononanoic acid

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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3,5,5-trimethylhexanoic acid; CAS number: 3302-10-1

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Isononanoic acid is a colourless liquid with a faint odour and the molecular formula: C9H18O2

The acid is hardly soluble in water, but miscible with most organic solvents. It usually occurs as an isomeric mixture of branched chain carboxylic acids with 9 carbon atoms (called isonononanoic acid). Different esters of the isononanoic acid are used in cosmetic formulations as skin care products, e.g. isononyl isononanoates (INCI) - esters of isononanol with the isononanoic acid.

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Last updated on: 29.10.2020