Procainamide Hydrochloride - Impurity A (EP); Benzocaine - Impurity G (EP); p-Aminobenzoic Acid; Bacterial Vitamin H1; p-Carboxyaniline; p-Carboxyphenylamine; Actipol; Amben;Pabacyd; Pabafilm; Trichochromogenic Factor; Vitamin BX; Vitamin H; Aminobenzoic Acid; Benzoic Acid, 4-amino; 4-Aminobenzoic Acid; (USP);