IOTA 9613 is a type of silicone elastomer microsphere, with the INCI name "Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer." Its core feature is its "cross-linked structure"—a stable molecular network that allows it to exist within formulations as tiny, spherical particles. This imparts a refined, dry, and silky-smooth tactile sensation. The product appears as a white powder with a low odor profile, and contains less than 0.1% of D4 and D5 cyclosiloxanes.
In color cosmetics, it is frequently used to improve the spreadability and skin adhesion of powders. For instance, when incorporated into liquid foundations, pressed powders, or loose powders, it helps reduce tackiness and creates a smoother finish. In lip glazes and lipsticks, it enhances the smoothness of application, while in eyeshadows and blushes, it improves the texture of the powder and ensures more even application. It is also utilized in skincare products—such as lotions, creams, and facial masks—to refine the sensory experience on the skin.
It is important to note that this ingredient primarily functions to enhance skin feel, texture, and cosmetic finish; it does not act as a sunscreen, a whitening agent, or a biologically active functional ingredient. Its actual performance depends on the overall formulation design, including the oil phase, the types of powders used, the emulsification structure, and the dosage level. From a product development and selection perspective, these microspheres are best evaluated as auxiliary ingredients designed to elevate the "premium skin feel" and "natural finish" of a product.