Isononanoic acid is a monofunctional carboxylic acid intermediate
i-Nonanoic acid is used as a monomer in the synthesis of alkyd resins for stoving enamels and two-component paints (primers and topcoats). It brings better yellowing performance in comparison to fatty acids.
Paint driers based on metal salts are also produced with i-nonanoic acid.
i-Nonanoic acid is used in the production of polyolester synthetic lubricants