235709

Octamethyltrisiloxane

98%

• Synonym(s): 1,1,1,3,3,5,5,5-Octamethyltrisiloxane, Dimethylbis(trimethylsiloxy)silane, Pentamethyl(trimethylsiloxy)disiloxane, Pentamethyl(trimethylsilyloxy)disiloxane
• Linear Formula: [(CH₃)₃SiO]₂Si(CH₃)₂
• CAS Number: 107-51-7
• Molecular Weight: 236.53
• Beilstein: 1753063
• EC Number: 203-497-4
• MDL number: MFCD00008264
• UNSPSC Code: 12352103
• PubChem Substance ID: 24853996
• NACRES: NA.22

Properties

• vapor density: >1 (vs air)
• Assay: 98%
• form: liquid
• refractive index: n20/D 1.384 (lit.)
• bp: 153 °C (lit.)
• mp: −82 °C (lit.)
• density: 0.82 g/mL at 25 °C (lit.)
• SMILES string: C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C
• InChI: 1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3
• InChI key: CXQXSVUQTKDNFP-UHFFFAOYSA-N

Description

General description

Octamethyltrisiloxane, commonly referred to as octamethylcyclotetrasiloxane, falls under the category of siloxanes. Its versatile applications include serving as a solvent, coupling agent, and surface tension modifier in various industries. Furthermore, it plays a significant role in the production of adhesives, sealants, and lubricants.

Application

Octamethyltrisiloxane is used as a solvent for good dispersion of styrene and polydimethylsiloxane (PDMS), which are used in the fabrication of perovskite barium titanate inverse opal films.

Safety Information

• Pictograms: GHS02
• Signal Word: Warning
• Hazard Statements: H226
• Precautionary Statements: P210 - P233 - P240 - P241 - P242 - P243
• Hazard Classifications: Flam. Liq. 3
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 3
• Flash Point(F): 84.2 °F - (External MSDS)
• Flash Point(C): 29 °C - (External MSDS)
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves