Synonyms: Propyl 4-Hydroxybenzoate, Propyl Parahydroxybenzoate, Ethyl Parahydroxybenzoate Imp. C (EP), Butyl Parahydroxybenzoate Imp. D (EP), Methyl Parahydroxybenzoate Imp. C (EP), Nipasol M, SKF-4392, Propyl Paraben, Butyl Parahydroxybenzoate Impurity D, Ethyl Parahydroxybenzoate Impurity C, Methyl Parahydroxybenzoate Impurity C