218472

Tetramethyl orthosilicate

98%

• Synonym(s): Tetramethoxysilane
• Linear Formula: Si(OCH₃)₄
• CAS Number: 681-84-5
• Molecular Weight: 152.22
• Beilstein/REAXYS Number: 1699658
• EC Number: 211-656-4
• MDL number: MFCD00008341
• UNSPSC Code: 12352103
• PubChem Substance ID: 24853068
• NACRES: NA.23

Properties

• vapor density: 5.25 (vs air)
• Quality Level: 200
• vapor pressure: 13 hPa ( 20 °C)
• assay: 98%
• form: liquid
• refractive index: n20/D 1.368 (lit.)
• bp: 121-122 °C (lit.)
• mp: −4 °C (lit.)
• density: 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
• InChI key: LFQCEHFDDXELDD-UHFFFAOYSA-N

Description

Application

Tetramethyl orthosilicate (TMOS) is popularly used in the sol-gel synthesis of silicates1 and chromium-doped silicates and in the formation of hexagonal mesoporous silica layers.

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

Safety Information

• pictograms: GHS02,GHS06,GHS05
• signalword: Danger
• hcodes: H226,H315,H318,H330
• pcodes: P210 - P233 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 1 Inhalation - Eye Dam. 1 - Flam. Liq. 3 - Skin Irrit. 2
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 1
• flash_point_f: 78.8 °F - closed cup
• flash_point_c: 26 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter