2,4,6,8-Tetramethylcyclotetrasiloxane, 99%, Thermo Scientific Chemicals

Product Code	Brand	Quantity
11359295	Thermo Scientific Alfa Aesar L16642.06	5 g
11369295	Thermo Scientific Alfa Aesar L16642.14	25 g
11379295	Thermo Scientific Alfa Aesar L16642.22	100 g

Description

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.

Chemical Identifiers

• CAS: 2370-88-9
• Molecular Weight (g/mol): 236.476
• InChI Key: WZJUBBHODHNQPW-UHFFFAOYSA-N
• PubChem CID: 6327421
• SMILES: C[Si-]1O[Si-]([O+]=[Si]([O+]=[Si](O1)C)C)C

• Molecular Formula: C4H12O4Si4
• MDL Number: MFCD00039567
• 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
• IUPAC Name: 2,4,6,8-tetramethyl-5,7-dioxa-1,3-dioxonia-2,4-disila-6,8-disilanidacycloocta-1,3-diene

Specifications

• Boiling Point: 134°C to 135°C
• CAS: 2370-88-9
• MDL Number: MFCD00039567
• Beilstein: 1787074
• 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
• SMILES: C[Si-]1O[Si-]([O+]=[Si]([O+]=[Si](O1)C)C)C
• Molecular Weight (g/mol): 236.476
• Formula Weight: 240.51
• Chemical Name or Material: 2,4,6,8-Tetramethylcyclotetrasiloxane

• Melting Point: -69°C
• Molecular Formula: C4H12O4Si4
• UN Number: UN1993
• Flash Point: 25°C (77°F)
• InChI Key: WZJUBBHODHNQPW-UHFFFAOYSA-N
• IUPAC Name: 2,4,6,8-tetramethyl-5,7-dioxa-1,3-dioxonia-2,4-disila-6,8-disilanidacycloocta-1,3-diene
• PubChem CID: 6327421
• Percent Purity: 99%

Safety and Handling

GHS H Statement
H226-H319
Flammable liquid and vapor.
Causes serious eye irritation.

GHS P Statement
P210-P280-P303+P361+P353-P305+P351+P338-P403+P235-P501a
Keep away from heat/sparks/open flames/hot surfaces. - No smoking.
Wear protective gloves/protective clothing/eye protection/face protection.
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Store in a well-ventilated place. Keep cool.
Dispose of contents/container in accordance with local/regional/national/international regulations.

Warning

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RUO – Research Use Only