Allyl 4-Hydroxybenzoate is widely used in the cosmetics and personal care industry as a preservative due to its antimicrobial properties. It helps prevent the growth of bacteria, fungi, and yeast in products like creams, lotions, and shampoos, extending their shelf life. Additionally, it is utilized in the formulation of certain pharmaceutical products to maintain stability and prevent contamination. Its allyl group also makes it a potential intermediate in organic synthesis, particularly in the production of polymers and specialty chemicals.