Parabens

**Definition:** Methyl, propyl, butyl, and ethyl esters of p-hydroxybenzoic acid. They have been approved by the FDA as antimicrobial agents for foods and pharmaceuticals. (From Hawley's Condensed Chemical Dictionary, 11th ed, p872)

**Tree numbers:** - D02.241.223.100.300.460 - D02.241.511.390.460 - D02.455.426.559.389.127.281.460 - D02.455.426.559.389.657.410.460

**Synonyms:** - Paraben