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

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

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.

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