1,1,3,3,5,5-Hexamethyltrisiloxane, 95%

Description

CAS: 1189-93-1 | C6H18O2Si3 | 206.463 g/mol

1,1,3,3,5,5-Hexamethyltrisiloxane is involved in the preparation of 2-bis(3-allyl-4-hydroxyphenyl)hexafluoropropane, which is associated with inorganic siloxane polymer and used as a coating material for the detection of toxic chemical warfare agents. It is also used as a silylating agent and to prepare 1,5-Bis[2-(1,2-epoxycyclohex-4-yl)ethyl]-1,1,3,3,5,5-hexamethyltrisiloxane from 4-vinyl-1-cyclohexene-1,2-epoxide by hydrosilylation.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
1,1,3,3,5,5-Hexamethyltrisiloxane is involved in the preparation of 2-bis(3-allyl-4-hydroxyphenyl)hexafluoropropane, which is associated with inorganic siloxane polymer and used as a coating material for the detection of toxic chemical warfare agents. It is also used as a silylating agent and to prepare 1,5-Bis[2-(1,2-epoxycyclohex-4-yl)ethyl]-1,1,3,3,5,5-hexamethyltrisiloxane from 4-vinyl-1-cyclohexene-1,2-epoxide by hydrosilylation.

Solubility
Slightly miscible with water.

Notes
Incompatible with strong oxidizing agents and strong acids.

Specifications

Chemical Identifiers

• CAS: 1189-93-1
• Molecular Formula: C6H18O2Si3
• Molecular Weight (g/mol): 206.463
• MDL Number: MFCD00039788
• InChI Key: YTEISYFNYGDBRV-UHFFFAOYSA-N
• Synonym: 1,1,3,3,5,5-hexamethyltrisiloxane, trisiloxane, 1,1,3,3,5,5-hexamethyl, 1,3,3,5,5-hexamethyltrisiloxane, 2,4,4,6-tetramethyl-3,5-dioxa-2,4,6-trisilaheptane, dimethylbis dimethylsilyloxy silane
• PubChem CID: 6327152
• IUPAC Name: [(dimethyl-$l^{3}-silanyl)oxy-dimethylsilyl]oxy-dimethylsilicon
• SMILES: C[Si](C)O[Si](C)(C)O[Si](C)C

• Boiling Point: 128°C
• Melting Point: -67°C
• Quantity: 100 g
• UN Number: UN1993
• Beilstein: 1746341
• Flash Point: 20°C (68°F)
• Solubility Information: Slightly miscible with water.
• Formula Weight: 208.48
• Percent Purity: 97%
• Refractive Index: 1.381
• Sensitivity: Moisture sensitive
• Density: 0.822
• Chemical Name or Material: 1,1,3,3,5,5-Hexamethyltrisiloxane

Safety and Handling

Hazard Category	H225
Hazard Statement	GHS H Statement H225 Highly flammable liquid and vapor.
Precautionary Statement	P210-P233-P240-P241-P242-P243-P280-P303+P361+P353-P370+P378q-P501c
DOTInformation	Transport Hazard Class: 3; Packing Group: II; Proper Shipping Name: FLAMMABLE LIQUIDS, N.O.S.
EINECSNumber	214-716-8
TSCA	Yes
Recommended Storage	Ambient temperatures

SDS

RUO – Research Use Only