1,3,5,7-Tetramethylcyclotetrasiloxane
D4H · TMCTS · 1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE · Tetramethylcyclotetrasiloxane · 2,4,6,8-Tetramethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane · H-4 · H4R · HH4R
Identifikatoren & physikalische Daten
| CAS No. | 2370-88-9 |
|---|---|
| Summenformel | C4H16O4Si4 |
| Durchschnittliche Molmasse | 240,51 g/mol |
| Monoisotopische Masse | 240,01256511 g/mol |
| SMILES | C[SiH]1O[SiH](C)O[SiH](C)O[SiH](C)O1 |
| InChIKey | BQYPERTZJDZBIR-UHFFFAOYSA-N |
| PubChem CID | 75404 |
| EC No. | 219-137-4 |
| DTXSID | DTXSID10870958 |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 36,9 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 4 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 12 |
| Formalladung | 0 |
| Komplexität | 99 |
| Stoffklassen | Metals -> Metalloid Compounds (Silicon) |
| SpringerMaterials Properties | Optical coefficient |
| Dampfdruck | 7.02 [mmHg]0.05-479Pa at 20℃ |
| Physical Description | LiquidColorless liquid with an odor like ether[Air Products MSDS] |
| Schmelzpunkt | −69 °C (lit.) |
| Siedepunkt | 134 °C |
| Dichte | 0.99 |
| Brechungsindex | 1.39 |
| Flammpunkt | 24 °C |
| Lagerbedingungen | 2-8°C |
| Aggregatzustand | clear liquid |
| Farbe | Colorless to Almost colorless |
| Wichte | 0.991 |
| Löslichkeit | Miscible with most organic solvents. Immiscible with water. |
| BRN | 1787074 |
| InChI | 1S/C4H16O4Si4/c1-9-5-10(2)7-12(4)8-11(3)6-9/h9-12H,1-4H3 |
| InChIKey | BQYPERTZJDZBIR-UHFFFAOYSA-N |
| SMILES | C[SiH]1O[SiH](C)O[SiH](C)O[SiH](C)O1 |
| LogP (Verteilungskoeffizient) | -2.4-5.54 at 25℃ |
| CAS Datenbank | 2370-88-9(CAS DataBase Reference) |
| EPA chemische Informationen | Cyclotetrasiloxane, 2,4,6,8-tetramethyl- (2370-88-9) |
Sicherheit & Vorschriften
| GHS-Einstufung | WarningH226 (100%): Flammable liquid and vapor [Warning Flammable liquids]P210, P233, P240, P241, P242, P243, P280, P303+P361+P353, P370+P378, P403+P235, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 2298 reports by companies from 5 notifications to the ECHA C&L Inventory. |
|---|---|
| Regulatorische Informationen | Chemical: Cyclotetrasiloxane, 2,4,6,8-tetramethyl-Cyclotetrasiloxane, 2,4,6,8-tetramethyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Cyclotetrasiloxane, 2,4,6,8-tetramethyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 15-07-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/15844Cyclotetrasiloxane, 2,4,6,8-tetramethyl-: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right. |
| Gefahrenübersicht | Decomposed by water (may evolve hydrogen gas)An irritantHarmful by ingestion and skin absorption[Air Products MSDS] See Octamethylcyclotetrasiloxane. |
| Hazard Classes and Categories | Flam. Liq. 3 (100%) |
| F | 10-21 |
| Wassergefährdungsklasse (WGK) | 3 |
| TSCA-Inventar-Status | TSCA listed |
| UN-Transportnummer | UN 1993 3/PG 3 |
| Zollcode | 29319090 |
| R-Sätze (R) | 10-36 |
| Gefahrensymbole | Xi |
| Sicherheitshinweise (S) | 16-26-36 |
| Gefahrenklasse | 3Flam. Liq. 3 |
| Verpackungsgruppe | III |
| Lagerklasse | 3 - Flammable liquids |
Anwendungen & Verwendung
Beschreibung
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.
Verwenden
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.