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Phenols are synthetic or natural aromatic compounds which carry at least one -OH group on an aromatic ring. Additional ring substitutions are common. The bactericidal properties of phenols (e.g., Thymol or Methylparaben) are widely employed in cosmetics. Their antioxidant properties (e.g., Di-t-Butyl Hydroquinone or BHA) are important. They are widely used in oxidation (e.g., p-Aminophenol) and direct hair dyes (e.g., Lawsone, or 2,5-Dinitrophenol) and as flavors (Methyl Salicylate). |