Trimethylsiloxysilicate

* A silicone

* Please read TIA's post on What Is It: Silicones and Should We Avoid Them

Functions:

There is little information available regarding Trimethylsiloxysilicate, although CosmeticsCop.com notes that it is a skin conditioning agent, and it is considered a soft skin adhesive (which may account for its use in numerous foundations). The Cosmetics Database also notes that it can be used as an anti-foaming agent in cosmetics and personal care products.

Safety Measures/Side Effects:

The Cosmetics Database finds Trimethylsiloxysilicate a low hazard ingredient, although data gaps are noted. However, it is important to recognize that Trimethylsiloxysilicate is a silicone derivative, and silicone compounds can be toxic if ingested (and when injected, in some cases), and have been shown to cause allergic reactions in some studies. Trimethylsiloxysilicate, when applied topically in skin care products is generally considered safe.

Recommended Products w/ Trimethylsiloxysilicate:

Almay Clear Complexion Concealer, Lorac Natural Performance Foundation, Napolean Perdis China Doll Concealer