Although not a preservative, Tocopheryl acetate plays a very important part in blends, especially those that contain essential oil as the natural antioxidant properties stop peroxides from forming in your essential oil blends (whether they be in creams, lotions, oils or gels) .
Peroxides can be harmful to the skin as well as making your product rancid. By adding Tocopheryl acetate you ensure the freshness and quality of your blends in addition to adding antoxidant properties to your final skincare product.