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;Tetramethylcyclotetrasiloxane;cyclic tetramethyltetrasiloxane
- CBNumber
- CB1453337
- Molecular Formula
- C4H16O4Si4
- Formula Weight
- 240.51
- MOL File
- 2370-88-9.mol
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)
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..…
N-Bromosuccinimide Price
- 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
- 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
- Product number
- T2076
- Product name
- 2,4,6,8-Tetramethylcyclotetrasiloxane
- Purity
- >95.0%(GC)
- Packaging
- 5g
- Price
- $31
- Updated
- 2024/03/01
- Product number
- T2076
- Product name
- 2,4,6,8-Tetramethylcyclotetrasiloxane
- Purity
- >95.0%(GC)
- Packaging
- 25g
- Price
- $101
- Updated
- 2024/03/01
- Product number
- L16642
- Product name
- 2,4,6,8-Tetramethylcyclotetrasiloxane, 99%
- Packaging
- 25g
- Price
- $160
- Updated
- 2024/03/01
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®ion=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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View Lastest Price from 2,4,6,8-Tetramethylcyclotetrasiloxane manufacturers
- 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
- Product
- 2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE 2370-88-9
- Price
- US $8.00/kg
- Min. Order
- 1kg
- Purity
- 99%
- Supply Ability
- 20MT
- Release date
- 2024-06-18
- Product
- 1,3,5,7-tetramethylcyclotetrasiloxane 2370-88-9
- Price
- US $0.00/Kg/Bag
- Min. Order
- 1Kg/Bag
- Purity
- 99%
- Supply Ability
- 20ton
- Release date
- 2021-10-14