Perfluorooctanoic acid (also known as Pentadecafluorooctanoic acid, Perfluorocaprylic acid, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-Pentadecafluorooctanoic acid, Octanoic acid, pentadecafluoro-, Perfluoroctanoic acid, Perfluoro-n-octanoic acid, Perfluoroheptanecarboxylic acid, Pentadecafluoro-1-octanoic acid, Pentadecafluoro-n-octanoic acid or n-perfluorooctanoic acid) is a substance of the carboxylic acid class.