2,4,6,8-Tetramethylcyclotetrasiloxane

Product Name: 2,4,6,8-Tetramethylcyclotetrasiloxane
CAS No.: 2370-88-9
Chemical Name: 2,4,6,8-Tetramethylcyclotetrasiloxane
Synonyms: H-4;H4R;D4H;HH4R;TMCTS;DK690;SP9144;GPRv53;DKFELEX0176;Tetramethylcyclotetrasiloxane
CBNumber: CB1453337
Molecular Formula: C4H16O4Si4
Formula Weight: 240.51
MOL File: 2370-88-9.mol

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2,4,6,8-Tetramethylcyclotetrasiloxane Property

Melting point:: −69 °C(lit.)
Boiling point:: 134 °C(lit.)
Density: 0.986 g/mL at 25 °C(lit.)
vapor pressure: 0.05-479Pa at 20℃
refractive index: n20/D 1.387(lit.)
Flash point:: 76 °F
storage temp.: 2-8°C
form: liquid
Specific Gravity: 0.991
color: Colorless to Almost colorless
Water Solubility: Miscible with most organic solvents. Immiscible with water.
Hydrolytic Sensitivity: 3: reacts with aqueous base
Sensitive: Moisture Sensitive
BRN: 1787074
InChIKey: BQYPERTZJDZBIR-UHFFFAOYSA-N
LogP: -2.4-5.54 at 25℃
CAS DataBase Reference: 2370-88-9(CAS DataBase Reference)
EPA Substance Registry System: Cyclotetrasiloxane, 2,4,6,8-tetramethyl- (2370-88-9)

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Safety

Hazard Codes: Xi
Risk Statements: 10-36
Safety Statements: 16-26-36
RIDADR: UN 1993 3/PG 3
WGK Germany: 3
F: 10-21
TSCA: Yes
HazardClass: 3
PackingGroup: III
HS Code: 29319090

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H226Flammable liquid and vapour

H319Causes serious eye irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P370+P378In case of fire: Use … for extinction.

P403+P235Store in a well-ventilated place. Keep cool.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 512990
Product name: 2,4,6,8-Tetramethylcyclotetrasiloxane
Purity: ≥98.5%, ≥99.999% trace metals basis
Packaging: 25ml
Price: $379
Updated: 2024/03/01

Sigma-Aldrich

Product number: 512990
Product name: 2,4,6,8-Tetramethylcyclotetrasiloxane
Purity: ≥98.5%, ≥99.999% trace metals basis
Packaging: 100ml
Price: $630
Updated: 2024/03/01

TCI Chemical

Product number: T2076
Product name: 2,4,6,8-Tetramethylcyclotetrasiloxane
Purity: >95.0%(GC)
Packaging: 5g
Price: $31
Updated: 2024/03/01

TCI Chemical

Product number: T2076
Product name: 2,4,6,8-Tetramethylcyclotetrasiloxane
Purity: >95.0%(GC)
Packaging: 25g
Price: $101
Updated: 2024/03/01

Alfa Aesar

Product number: L16642
Product name: 2,4,6,8-Tetramethylcyclotetrasiloxane, 99%
Packaging: 25g
Price: $160
Updated: 2024/03/01

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2,4,6,8-Tetramethylcyclotetrasiloxane Chemical Properties,Usage,Production

Description

2, 4, 6, 8-TETRAMETHYLCYCLOTETRASILOXANE can be used as the precursor for the deposition of polysiloxane, cyclic siloxane, silicon dioxide, and gate dielectrics in thin-film transistors (TFT) (for example, for the preparation of ultralow dielectric constant pSiCOH film), and is a component of photochemically formed SiOX monolayers on TiO. It is a good impregnant of photoelectric material. It can be used for the manufacturing of modified siloxane with defined hydrogen content and chain quality.

Chemical Properties

Colorless or yellowish transparent liquid

Uses

2,4,6,8-Tetramethylcyclotetrasiloxane can occur addition reaction with unsaturated alkenes, so it’s utilized widely to synthesize variety functional reactive silicone fluids which is used to form silicone block copolymer, or used as crosslinker of vinyl addition silicone rubber. 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.

Uses

2, 4, 6, 8-Tetramethylcyclotetrasiloxane (TMCTS) is an important precursor for the deposition of polysiloxane, cyclic siloxane, silicon dioxide, oxycarbide thin films with low dielectric constant for microelectronics, semiconductors and other applications

General Description

Atomic number of base material: 14 Silicon

Flammability and Explosibility

Flammable

Synthesis

The synthesis process of 2,4,6,8-Tetramethylcyclotetrasiloxane is as follows. A 1-L four-necked flask equipped with a thermometer, stirrer, column packed with cylindrical glass of about 1x1 mm to a height of 500 mm, water-cooled condenser, outlet tube, and distillate receiver was connected to a vacuum pump. To the flask were fed 100 g of trimethylsiloxy end-capped dimethylpolysiloxane having a viscosity of 10,000 centistokes at 25°C and 1.0 g of the catalyst (i) synthesized above, after which agitation was commenced. While the flask interior was kept under a reduced pressure of 50 mmHg, the flask was heated at 250-260°C using a mantle heater. A fraction distilled out for 14 hours was collected (45 g). The residue (31 g) was a clear liquid. yeild= 52%

References

https://www.alfa.com/zh-cn/catalog/L16642/
http://www.sigmaaldrich.com/catalog/product/aldrich/512990?lang=en&region=US
Grill, A., and V. Patel. "Ultralow dielectric constant pSiCOH films prepared with tetramethylcyclotetrasiloxane as skeleton precursor." Journal of Applied Physics 104.2(2008):107.
Zhang, Jianming, D. S. Wavhal, and E. R. Fisher. "Mechanisms of SiO2 film deposition from tetramethylcyclotetrasiloxane, dimethyldimethoxysilane, and trimethylsilane plasmas." Journal of Vacuum Science & Technology A Vacuum Surfaces & Films 22.1(2004):201-213.
Fujino, Katsuhiro, et al. "Low-Temperature Atmospheric-Pressure Chemical Vapor Deposition, Using 2, 4, 6, 8-Tetramethylcyclotetrasiloxane and Ozone." Japanese Journal of Applied Physics 33. 4A (1994):2019-2024.

2,4,6,8-Tetramethylcyclotetrasiloxane Preparation Products And Raw materials

Raw materials

Preparation Products

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2,4,6,8-Tetramethylcyclotetrasiloxane Suppliers

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View Lastest Price from 2,4,6,8-Tetramethylcyclotetrasiloxane manufacturers

HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD

Product: 2,4,6,8-Tetramethylcyclotetrasiloxane 2370-88-9
Price: US $110.00-70.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 5000
Release date: 2024-08-14

Hubei Changfu Chemical Co., Ltd.

Product: 2,4,6,8-Tetramethylcyclotetrasiloxane 2370-88-9
Price: US $0.00-0.00/kg
Min. Order: 0.10000000149011612kg
Purity: 97%
Supply Ability: 200tons
Release date: 2023-12-22

Wuhan KEMI-WORKS Chemical Co., Ltd.

Product: 2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE 2370-88-9
Price: US $1.00/Kg/Drum
Min. Order: 1KG
Purity: 98%min
Supply Ability: 10mt per month
Release date: 2021-09-18

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1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE 95+%

2,4,6,8-Tetramethylcyclotetrasiloxane, 95%, mixture of isomers

1,3,5,7-Tetramethyl-2,4,6,8-tetraoxa-1,3,5,7-tetrasilacyclooctane

2,4,6,8-Tetramethylcyclooctanetetrasiloxane

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Anti-HRH4 (N-terminal) antibody produced in rabbit

GPRv53

H4R

HH4R

1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE 99+%

(D4H) 1,3,5,7-tetraMethylcyclotetrasiloxane

2,4,6,8-TetraMethylcyclotetrasiloxane

1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE

2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE

cyclic tetramethyltetrasiloxane

2,4,6,8-Tetramethylcyclotetrasiloxane Liquid

TMCTS

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D4H

1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE, 99.0%

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DK690

DKFELEX0176

2370-88-9

C4H16O4Si4

C4H18O4Si4

HSiCH3O4

Organosilicon

Organometallic Reagents

Siloxanes