Propylparaben, derived from p-hydroxybenzoic acid, is naturally present in various plants and certain insects. Moreover, it can be synthesized for applications in cosmetics, pharmaceuticals, and food products. Belonging to the paraben family, it serves as an effective preservative in numerous water-based cosmetics like creams, lotions, shampoos, and bath items. Its classification as a food additive assigns it the E number E216. Propyl paraben stands out as one of the most commonly used parabens in cosmetic formulations. It can be found in various products including moisturizers, shampoos, conditioners, makeups, and shaving products. Typically combined with other parabens such as Methyl paraben, its chemical stability in room temperature and across a wide pH range (4.5-7.5) is advantageous for extending product shelf-life. FDA regulations stipulate a maximum concentration of 25% for Propyl paraben in cosmetics
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