Sucrose Tetrastearate Triacetate

Sucrose tetrastearate triacetate is a synthetic compound derived from sucrose (sugar) combined with stearic acid and acetic acid. It functions primarily as an emollient and emulsifying agent in skincare formulations, helping to blend oil and water-based ingredients together whilst conditioning the skin surface.This ingredient is relatively uncommon in skincare products, appearing in less than 0.5% of formulations. It is valued in cosmetic chemistry for its ability to improve texture and stability without being occlusive.

As an emollient, sucrose tetrastearate triacetate works by creating a thin film on the skin that helps reduce transepidermal water loss—the natural evaporation of moisture from the skin. This supports the skin's natural barrier function.As an emulsifier, its molecular structure allows it to sit at the interface between oil and water, binding these two otherwise incompatible phases together. This stabilising effect means the product maintains a consistent texture and efficacy throughout its shelf life.

This ingredient is typically formulated by manufacturers rather than used as a standalone product. When present in a serum, moisturiser, or treatment, use according to the product instructions—usually once or twice daily. No special activation or layering strategy is required.

Generally well-tolerated across skin types. Individuals with fungal acne or a sensitivity to emulsifiers may want to patch-test before full application.