Description

Diethoxydimethylsilane (CAS No. 78-62-6) is a highly versatile organosilicon compound with the molecular formula C₆H₁₆O₂Si. This clear, colorless liquid is widely used in organic synthesis, surface modification, and as a precursor for silicon-based materials. Its IUPAC name, diethoxy(dimethyl)silane, reflects its molecular structure, featuring two ethoxy groups and two methyl groups bonded to a central silicon atom. With a purity of ≥98%, our product is ideal for researchers and scientists working in materials science, coatings, and polymer chemistry. Diethoxydimethylsilane is particularly valued for its hydrolytic stability and reactivity, making it a key intermediate in the production of silicones, silane coupling agents, and hydrophobic coatings. Packaged under inert gas to ensure stability, this compound is available in various quantities to meet both laboratory and industrial-scale needs.

Properties

• CAS Number: 78-62-6
• Complexity: 65.5
• IUPAC Name: diethoxy(dimethyl)silane
• InChI: InChI=1S/C6H16O2Si/c1-5-7-9(3,4)8-6-2/h5-6H2,1-4H3
• InChI Key: YYLGKUPAFFKGRQ-UHFFFAOYSA-N
• Exact Mass: 148.091956283
• Molecular Formula: C6H16O2Si
• Molecular Weight: 148.28
• SMILES: CCO[Si](C)(C)OCC
• Topological: 18.5
• Monoisotopic Mass: 148.091956283
• Physical Description: Dimethyldiethoxysilane appears as a colorless liquid. Less dense than water and insoluble in water. Vapors heavier than air.
• Synonyms: Diethoxydimethylsilane, Dimethyldiethoxysilane, Diethoxy(dimethyl)silane, Silane, diethoxydimethyl-, Dimethyl-diethoxysilan, Dimethyl-diethoxysilan [Czech], CCRIS 1321, dimethyl diethoxy silane, EINECS 201-127-6, NSC 77085, UNII-I3931J3ZJ2, BRN 1736110, DTXSID6052538, I3931J3ZJ2, NSC-77085, EXP-49, SILANE,DIETHOXY,DIMETHYL, DTXCID7031111, 4-04-00-04101 (Beilstein Handbook Reference), CD5600, UN 2380, SZ 6078, inchi=1/c6h16o2si/c1-5-7-9(3,4)8-6-2/h5-6h2,1-4h, yylgkupaffkgrq-uhfffaoysa-n, 78-62-6, Dimethylsilicondiethoxide, Bis(ethoxy)dimethylsilane, 118529-50-3, KBE 22, UN2380, MFCD00009068, diethoxyldimethylsilane, Diethoxydimethylsilane, 97%, SCHEMBL64126, SCHEMBL2318266, CHEMBL3561087, SCHEMBL15194638, NSC77085, Tox21_303834, WLN: 2O-SI-1&1&O2, AKOS008901253, CAS-78-62-6, NCGC00357107-01, LS-13240, DB-056320, D0454, NS00041067, Diethoxydimethylsilane, purum, >=97.0% (GC), S07125, Q424884, Dimethyldiethoxysilane [UN2380] [Flammable liquid]

Application

Diethoxydimethylsilane is widely used as a crosslinking agent in silicone polymers and resins, enhancing thermal and mechanical properties. It serves as a precursor for surface modification, imparting hydrophobicity to glass, ceramics, and metals. In sol-gel processes, it acts as a co-precursor to tailor the properties of hybrid organic-inorganic materials. Additionally, it is employed in the synthesis of specialty silicones for adhesives, sealants, and coatings. Its reactivity with hydroxyl groups makes it valuable for bonding organic and inorganic phases in composite materials.

Safety and Hazards

GHS Hazard Statements

• H225: Highly Flammable liquid and vapor [Danger Flammable liquids]
• H401: Toxic to aquatic life [Hazardous to the aquatic environment, acute hazard]
• H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P210, P233, P240, P241, P242, P243, P273, P280, P303+P361+P353, P370+P378, P391, P403+P235, and P501

Hazard Classes and Categories

• Flam. Liq. 2 (98%)
• Skin Irrit. 2 (62.9%)
• Eye Irrit. 2 (62.9%)
• Acute Tox. 4 (17.1%)
• STOT SE 3 (11.8%)

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