Versatic 9-11 Acid (CAS NO.71700-95-3) is a mixture of tertiary carboxylic acids each having 9 to 11 carbon atoms in the molecule. The vinyl ester of Versatic 9-11 Acid has been shown to possess skin irritating and sensitizing properties comparable to those of butyl and 2-ethylhexyl acrylates. Versatic 9-11 Acid and its monoglycidyl esters are much less irritant than the vinyl ester and should not prove hazardous to the skin, but unnecessary contact should be avoided.