235687

Hexamethylcyclotrisiloxane

98%

• Synonym(s): Cyclic (D3) permethylsiloxane
• Empirical Formula (Hill Notation): C₆H₁₈O₃Si₃
• CAS Number: 541-05-9
• Molecular Weight: 222.46
• EC Number: 208-765-4
• MDL number: MFCD00005943
• UNSPSC Code: 12352103
• PubChem Substance ID: 24853993
• NACRES: NA.22

Properties

• vapor density: 1 (vs air)
• assay: 98%
• form: solid
• bp: 134 °C (lit.)
• mp: 50-64 °C (lit.)
• SMILES string: C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O1
• InChI: 1S/C6H18O3Si3/c1-10(2)7-11(3,4)9-12(5,6)8-10/h1-6H3
• InChI key: HTDJPCNNEPUOOQ-UHFFFAOYSA-N

Description

Application

Hexamethylcyclotrisiloxane (D3) can be used in the synthesis of:

• Polysiloxanes by anionic ring-opening polymerization.        
• Thin films by pulsed- plasma-enhanced chemical vapor deposition (PECVD) for the application of insulating biomaterials.
•  Dimethoxydimethylsilane by treating with dimethyl carbonate via deoligomerization using alkali metal hydroxide catalyst.

Safety Information

• pictograms: GHS02
• signalword: Danger
• hcodes: H228
• pcodes: P210
• Hazard Classifications: Flam. Sol. 1
• Storage Class: 4.1B - Flammable solid hazardous materials
• wgk_germany: WGK 3
• flash_point_f: 95.0 °F - closed cup
• flash_point_c: 35 °C - closed cup
• ppe: dust mask type N95 (US), Eyeshields, Gloves, type P3 (EN 143) respirator cartridges