Aspirin Impurity A

;paraben impurity A.|4-Carboxyphenol|4-Hydroxy benzoic acid|4-Hydroxy benzoic acid;Salicylic Acid Impurity A|4-hydroxybenzoic acid|4-hydroxybenzoic acid.|Acetylsalicylic acid Impurity-A|Methyl Parahydroxybenzoate - Impurity A|Methylparaben impurity A.|NSC 4961;|p-Carboxyphenol|p-Hydroxybenzoic Acid|p-Salicylic Acid|Paraben-acid;