Octamethyltrisiloxane

Octamethyltrisiloxane (CAS 107-51-7) is a low-molecular-weight linear silicone fluid, commercially available under trade names including OS 20, KF 96L1.0, KF 96A1cs, CO9816, and FRD 20. It carries no assigned E-code and is classified under HS code 29319090. Its short siloxane chain distinguishes it from heavier polydimethylsiloxane grades.

In personal care formulations, it functions as a fast-evaporating carrier solvent, delivering active ingredients to skin or hair before volatilising cleanly without residue. In metalworking and textile processing, its low surface tension allows it to spread uniformly across substrates, reducing friction and improving release properties at the point of contact.

Octamethyltrisiloxane is supplied as a clear liquid and falls under REACH registration requirements for European procurement. Buyers should confirm supplier REACH compliance documentation and SDS before import. Standard packaging formats include drums and IBC containers, with grades varying by purity specification depending on end-use requirements.