Among the numerous cosmetic ingredient lists, IOTA 91002 might be a "hidden master". This white powder, scientifically known as trimethylsiloxysilicate, may seem unremarkable, but with its unique properties, it has made a significant impact in the fields of makeup, skincare, and hair care.
IOTA 91002 is the product of a highly cross-linked reaction between tetraalkylsiloxane and trimethylsiloxane after hydrolysis. It contains a small amount of alkoxy and hydroxyl groups. This structure endows it with excellent hydrophobicity and film-forming properties - it can form a thin, breathable protective film on the skin or hair surface, which can both retain moisture and resist external moisture invasion. In sunscreen, it helps evenly distribute active ingredients, enhancing waterproof performance, and maintaining the sunscreen effect even after swimming; in foundation liquid, it can improve the spreadability of the powder, making the makeup more smooth and natural, and less prone to powder caking.
When using IOTA 91002, it is important to note that it needs to be dissolved in a non-aromatic organic solvent first, then added to the product, or mixed directly with volatile silicone oil. The recommended addition amount in makeup products is 2% - 10%, while in skincare and hair care products, it should be adjusted according to the needs.
As a non-hazardous product, IOTA 91002 should be stored in a moisture-proof and acid-base impurity-free environment. Under sealed conditions, its shelf life is two years. After opening, unused products should be sealed promptly to avoid resin precipitation due to evaporation. It is precisely this "low-key yet efficient" characteristic that makes IOTA 91002 a "secret weapon" in the hands of cosmetic formulae designers.