trực tiếp đá gà hôm nay

ChemicalBook >> CAS DataBase List >>2,4,6,8-Tetramethylcyclotetrasiloxane

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
Molecular Weight:
240.51
MDL Number:
MFCD00039567
MOL File:
2370-88-9.mol
MSDS File:
SDS
Last updated:2024-12-25 10:18:12

2,4,6,8-Tetramethylcyclotetrasiloxane Properties

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
Viscosity 6.9mm2/s
Water Solubility Miscible with most organic solvents. Immiscible with water.
Sensitive Moisture Sensitive
Hydrolytic Sensitivity 3: reacts with aqueous base
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

SAFETY

Risk and Safety Statements

Symbol(GHS)  trực tiếp đá gà hôm nayLiên kết đăng nhậptrực tiếp đá gà hôm nayLiên kết đăng nhập
GHS02,GHS07
Signal word  Warning
Hazard statements  H319-H226
Precautionary statements  P280a-P305+P351+P338-P501a-P210-P233-P240-P241+P242+P243-P264-P280-P303+P361+P353-P305+P351+P338+P337+P313-P370+P378-P403+P235-P501
Hazard Codes  Xi
Risk Statements  10-36
Safety Statements  16-26-36
RIDADR  UN 1993 3/PG 3
WGK Germany  3
10-21
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29319090
NFPA 704
2
2 0

2,4,6,8-Tetramethylcyclotetrasiloxane price More Price(21)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 512990 2,4,6,8-Tetramethylcyclotetrasiloxane ≥98.5%, ≥99.999% trace metals basis 2370-88-9 25ml $361 2024-06-20 Buy
Sigma-Aldrich 512990 2,4,6,8-Tetramethylcyclotetrasiloxane ≥98.5%, ≥99.999% trace metals basis 2370-88-9 100ml $600 2024-06-20 Buy
TCI Chemical T2076 2,4,6,8-Tetramethylcyclotetrasiloxane >95.0%(GC) 2370-88-9 5g $31 2024-06-20 Buy
TCI Chemical T2076 2,4,6,8-Tetramethylcyclotetrasiloxane >95.0%(GC) 2370-88-9 25g $101 2024-06-20 Buy
Alfa Aesar L16642 2,4,6,8-Tetramethylcyclotetrasiloxane, 99% 2370-88-9 25g $152 2024-06-20 Buy
Product number Packaging Price Buy
512990 25ml $361 Buy
512990 100ml $600 Buy
T2076 5g $31 Buy
T2076 25g $101 Buy
L16642 25g $152 Buy

2,4,6,8-Tetramethylcyclotetrasiloxane Chemical Properties,Uses,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

//www.alfa.com/zh-cn/catalog/L16642/
//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.

75-54-7
7732-18-5
2370-88-9
6166-86-5
6166-87-6
Synthesis of 2,4,6,8-Tetramethylcyclotetrasiloxane from Dichloromethylsilane and Water
Global( 259)Suppliers
Supplier Tel Email Country ProdList Advantage
Sirichem (Zhangjiakou) Sci-Tech.Co.,Ltd.
+8615831567206 China 58 58
Hubei Changfu Chemical Co., Ltd.
+86-027-84396550 +8617721064038 sales@cfsilanes.com China 400 58
Capot Chemical Co.,Ltd.
571-85586718 +8613336195806 sales@capotchem.com China 29797 60
Jiangxi New jiayi New Materials Co., Ltd.
15988280056 mina@xjysi.com CHINA 27 55
Shanghai Daken Advanced Materials Co.,Ltd
+86-371-66670886 info@dakenam.com China 14666 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21709 55
Hangzhou FandaChem Co.,Ltd.
+8615858145714 fandachem@gmail.com China 9362 55
ATK CHEMICAL COMPANY LIMITED
+undefined-21-51877795 ivan@atkchemical.com China 32294 60
Shanxi Naipu Import and Export Co.,Ltd
+86-13734021967 +8613734021967 kaia@neputrading.com China 1011 58
career henan chemical co
+86-0371-86658258 sales@coreychem.com China 29919 58

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

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
trực tiếp đá gà hôm nayLiên kết đăng nhập 2025-01-25 2,4,6,8-Tetramethylcyclotetrasiloxane
2370-88-9
US $0.00-0.00 / kg 0.10000000149011612kg 97% 200tons Hubei Changfu Chemical Co., Ltd.
trực tiếp đá gà hôm nayLiên kết đăng nhập 2024-03-21 2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE
2370-88-9
US $0.00-0.00 / kg 1kg 98% 1000kg LY Global chemicals co.,ltd .
trực tiếp đá gà hôm nayLiên kết đăng nhập 2024-03-06 2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE
2370-88-9
US $1.00 / Kg/Drum 1KG 98%min 10mt per month Wuhan KEMI-WORKS Chemical Co., Ltd.

2,4,6,8-Tetramethylcyclotetrasiloxane Spectrum

2,4,6,8-tetramethylcyclotetrasiloxane,mixtureofisomers Cyclotetrasiloxane, 2,4,6,8-tetramethyl- Tetramethylcyclotetrasiloxane 2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE, 9 9.5+% 1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE (2% CHLOROSILANE STABILIZED) 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 2,4,6,8-Tetramethylcyclooctatetrasiloxane H-4 2,4,6,8-Tetramethylcyclotetrasiloxane,95% 1,3,5,7-Cyclotetra(methylsiloxane) SP9144 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 TMCTS 1,2,5,7-Tetramethylcyclotetrasiloxane 2,4,6,8-Tetramethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane 2,4,6,8-tetramethyl-cyclotetrasiloxan D4H 2,4,6,8-tetramethyl-1,3,5,7,2λ3,4λ3,6λ3,8λ3-tetraoxatetrasilocane 2,4,6,8-Tetramethylcyclotetrasiloxane(HD4) cyclic tetramethyltetrasiloxane 2,4,6,8-Tetramethylcyclotetrasiloxane Liquid 1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE, 99.0% 1,3,5,7-Tetramethyl-cyclotetrasiloxane (DH4) DK690 2370-88-9 C4H16O4Si4 C4H18O4Si4 HSiCH3O4 Organosilicon Organometallic Reagents Siloxanes Siloxanes
trò chơi cờ bạc game điện tử máy đánh bạc máy đánh bạc hoàng gia Tải game ăn tiền thật