Phenoxyglycerin is a synthetic compound often used as a preservative and moisturizing agent in cosmetics and personal care products. It functions by providing antimicrobial properties, helping to extend the shelf life of products and prevent microbial growth. Additionally, it acts as a humectant, attracting moisture to the skin and enhancing the overall texture of formulations. Generally considered safe for use, it is favored for its mildness and effectiveness in various formulations.