Synonyms: 4-Carboxyaniline, 4-Carboxyphenylamine, Actipol, Amben, Aniline-4-carboxylic acid, Anti-Chromotrichia factor, Anticanitic vitamin, Anticantic vitamin, Antichromotrichia factor, Bacterial vitamin H1, Chromotrichia factor, Hachemina, NSC 7627, PAB, PABA, Pabacyd, Pabafilm, Pabamine, Paraminol, Paranate, Romavit, Sunbrella, Trichochromogenic factor, Vitamin BX, Vitamin H’, p-Aminobenzoic acid, p-Carboxyaniline, p-Carboxyphenylamine,Benzoic acid, p-amino- (7CI,8CI), 4-Aminobenzoic acid, 4-Aminobenzenecarboxylic acid, p-Aminobenzenecarboxylic acid, para-Aminobenzoates