2,4,6,8-Tetramethylcyclotetrasiloxane, 99%

Description

CAS: 2370-88-9 | C4H12O4Si4 | 236.476 g/mol

Tetramethyl-cyclotetrasiloxane is a good impregnant of photoelectric material. It is used to manufacture of modified siloxane with defined hydrogen content and chain quantity. It is also used in production of silicone polymers and acts as a precursor for the deposition of polysiloxane, cyclic siloxane, silicon dioxide, oxycarbide thin films with low dielectric constant for microelectronics and semiconductors.

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
Tetramethyl-cyclotetrasiloxane is a good impregnant of photoelectric material. It is used to manufacture of modified siloxane with defined hydrogen content and chain quantity. It is also used in production of silicone polymers and acts as a precursor for the deposition of polysiloxane, cyclic siloxane, silicon dioxide, oxycarbide thin films with low dielectric constant for microelectronics and semiconductors.

Solubility
Miscible with most organic solvents. Immiscible with water.

Notes
Incompatible with oxidizing agents, bases and acids. Store in a cool place.

Specifications

Chemical Identifiers

• CAS: 2370-88-9
• Molecular Formula: C4H12O4Si4
• Molecular Weight (g/mol): 236.476
• MDL Number: MFCD00039567
• InChI Key: WZJUBBHODHNQPW-UHFFFAOYSA-N
• Synonym: 2,4,6,8-tetramethylcyclotetrasiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, tmcts, cyclotetrasiloxane, 2,4,6,8-tetramethyl, 2,4,6,8-tetramethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, 1,2,5,7-tetramethylcyclotetrasiloxane, 2,4,6,8-tetramethyl-cyclotetrasiloxan, 2,4,6,8-tetramethylcyclotetrasiloxne, 1,3,5,7-tetramethyl cyclotetrasiloxane
• PubChem CID: 6327421
• IUPAC Name: 2,4,6,8-tetramethyl-5,7-dioxa-1,3-dioxonia-2,4-disila-6,8-disilanidacycloocta-1,3-diene
• SMILES: C[Si-]1O[Si-]([O+]=[Si]([O+]=[Si](O1)C)C)C

• Boiling Point: 134°C to 135°C
• Melting Point: -69°C
• Quantity: 25 g
• UN Number: UN1993
• Beilstein: 1787074
• Flash Point: 25°C (77°F)
• Solubility Information: Miscible with most organic solvents. Immiscible with water.
• Formula Weight: 240.51
• Percent Purity: 99%
• Refractive Index: 1.387
• Sensitivity: Moisture sensitive
• Density: 0.991
• Chemical Name or Material: 2,4,6,8-Tetramethylcyclotetrasiloxane

Safety and Handling

Hazard Category	H226-H315-H319-H335
Hazard Statement	GHS H Statement H226-H319 Flammable liquid and vapor. Causes serious eye irritation.
Precautionary Statement	P210-P233-P235-P240-P241-P242-P243-P261-P264b-P271-P280-P303+P361+P353-P304+P340-P305+P351+P338-P312-P332+P313-P363-P370+P378q-P501c
DOTInformation	Transport Hazard Class: 3; Packing Group: III; Proper Shipping Name: FLAMMABLE LIQUIDS, N.O.S.
EINECSNumber	219-137-4
TSCA	Yes
Recommended Storage	Ambient temperatures; Store under Nitrogen

SDS

RUO – Research Use Only