Octamethyltrisiloxane

• CAT Number: R051594
• CAS Number: 107-51-7
• Molecular Formula: (CH3)3-Si-[O-Si(CH3)2]n-O-Si(CH3)3
• Molecular Weight: 236.533
• Purity: ≥95%
• Synonyms: 1,1,1,3,3,5,5,5-Octamethyltrisiloxane; Dimethylbis(trimethylsiloxy)silane; FRD 20; KF 96A1cs; KF 96L1.0; OS 20; Pentamethyl(trimethylsiloxy)disiloxane; Pentamethyl(trimethylsilyloxy)disiloxane
• Storage: Desiccate at -20 ℃
• IUPAC Name: dimethyl-bis(trimethylsilyloxy)silane
• InChI: InChI=1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3
• InChIKey: CXQXSVUQTKDNFP-UHFFFAOYSA-N
• SMILES: C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C

Octamethyltrisiloxane is a linear siloxane compound consisting of three silicon-oxygen units and eight methyl groups. It is commonly used in various industrial and cosmetic applications due to its unique properties, such as low surface tension, volatility, and excellent spreading characteristics. Octamethyltrisiloxane is frequently utilized in personal care products, including lotions, sunscreens, and hair care items, as a conditioning agent and to improve product texture and application. In industrial settings, it is employed as a surfactant and lubricant. Its chemical stability and low toxicity make it a versatile ingredient in formulations that require smooth spreading and non-greasy finishes.