A fluoroalkanoic acid that is nonanoic acid in which all of the hydrogens in the alkyl chain are replaced by fluorines. California Office of Environmental Health Hazard Assessment (OEHHA): Perfluorononanoic acid (PFNA) and its salts can cause male reproductive toxicity according to an independent committee of scientific and health experts.ChEBI: Perfluorononanoic acid is a fluoroalkanoic acid that is nonanoic acid in which all of the hydrogens in the alkyl chain are replaced by fluorines. It has a role as a surfactant, a xenobiotic and a persistent organic pollutant. It is functionally related to a nonanoic acid.