Trimethylsiloxane is a high-quality organosilicon functional ingredient (IOTA 91002) commonly used in cosmetics. It is produced by highly cross-linking the co-hydrolysis of tetraalkylsiloxane and trimethylsiloxane, containing trace amounts of alkoxy and hydroxyl groups. Its excellent properties make it widely compatible with various beauty products, including skincare, sunscreen, makeup, and haircare.
This ingredient appears as a fine white powder with stable physicochemical properties. Its core advantages are its excellent film-forming and hydrophobic properties. After application, it forms a thin, breathable protective film on the skin and hair surface, effectively resisting water washing, sweat, and oil, while locking in makeup pigments and skincare nutrients, significantly improving product longevity and solving problems such as makeup fading and ingredient loss. Simultaneously, it possesses excellent rheological properties, optimizing the product's texture, eliminating stickiness and heaviness, and providing a refreshing and silky user experience. It can also help enhance the protective effect of sunscreen products.
In formulation applications, it is well compatible with volatile silicone oils and low-viscosity silicone oils. The recommended addition level in the color cosmetics field is 2%-10%. Before use, it must be dissolved in a non-aromatic organic solvent before being mixed into the product system. The product is non-flammable and non-explosive. It can be stored at room temperature for two years in a sealed container. After opening, it must be sealed tightly to prevent moisture absorption and avoid impurities and resin precipitation, ensuring optimal performance and formulation stability.