341436

Tetramethylorthosilikat

≥99%

• Synonym(e): Orthokieselsäure-tetramethylester
• Lineare Formel: Si(OCH₃)₄
• CAS-Nummer: 681-84-5
• Molekulargewicht: 152.22
• Beilstein: 1699658
• EG-Nummer: 211-656-4
• MDL-Nummer: MFCD00008341
• UNSPSC-Code: 12352103
• PubChem Substanz-ID: 24860943
• NACRES: NA.23

Eigenschaften

• Dampfdichte: 5.25 (vs air)
• Qualitätsniveau: 200
• Dampfdruck: 13 hPa ( 20 °C)
• Assay: ≥99%
• Form: liquid
• Brechungsindex: n20/D 1.368 (lit.)
• bp: 121-122 °C (lit.)
• mp (Schmelzpunkt): −4 °C (lit.)
• Dichte: 1.023 g/mL at 25 °C (lit.)
• SMILES String: CO[Si](OC)(OC)OC
• InChI: 1S/C4H12O4Si/c1-5-9(6-2,7-3)8-4/h1-4H3
• InChIKey: LFQCEHFDDXELDD-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Tetramethyl orthosilicate is a colorless organosilicon compound consisting of four methoxy groups bonded to a silicon atom. On hydrolysis, it produces silicon dioxide and methanol. It has been widely used in catalysis, synthesis of nanomaterials, ceramics, zeolites, and coating materials.

Anwendung

Tetramethyl orthosilicate can be used:

• As a precursor to synthesize organic-inorganic coating materials by sol-gel processing method.
• As an efficient reagent for direct amidation of aliphatic and aromatic carboxylic acids with amines and anilines.
• As a precursor to fabricate SiO₂ nanocomposite films by chemical vapor deposition(CVD) method.
• As a selective catalyst ofC3-methylation of indole.

Used in the sol-gel synthesis of chromium-doped silicates and in the formation of hexagonal mesoporous silica layers.

Sicherheitshinweise

• Piktogramme: GHS02,GHS06,GHS05
• Signalwort: Danger
• H-Sätze: H226,H315,H318,H330
• P-Sätze: P210 - P233 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Gefahreneinstufungen: Acute Tox. 1 Inhalation - Eye Dam. 1 - Flam. Liq. 3 - Skin Irrit. 2
• Lagerklassenschlüssel: 3 - Flammable liquids
• WGK: WGK 1
• Flammpunkt (°F): 78.8 °F - closed cup
• Flammpunkt (°C): 26 °C - closed cup
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter