The common building blocks used to manufacture silicone polymers are known as cyclosiloxanes and linear siloxanes. These substances share a common chemistry, but each substance is different with regard to its specific properties and uses. The most common of these silicone substances in commercial use are known as D4, D5, D6, L2, L3, L4, and L5.
Cyclosiloxanes are used in the manufacture of silicones, in combination or alone in personal care products, and as carriers, lubricants and solvents in a variety of commercial applications. Data generated from these studies support their safety and demonstrate that the products in which they are a component are safe when used as intended.