Dimethoxymethyloctadecylsilane

十八烷基甲基二甲氧基硅烷

Also known as: Dimethoxy(methyl)(octadecyl)silane, Methyloctadecyldimethoxysilane, dimethoxymethyl-n-octadecylsilane, N-Octadecylmethyldimethoxysilane, Octadecylmethyldimethoxysilane, Silane, dimethoxymethyloctadecyl-, SILANE ODM-DIMETHOXY, MFCD01631675

Dimethoxymethyloctadecylsilane (CAS 70851-50-2) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C21H46O2Si and a molecular weight of 358.674 g/mol. It is also known as Dimethoxy(methyl)(octadecyl)silane, Methyloctadecyldimethoxysilane and dimethoxymethyl-n-octadecylsilane. Key properties include a melting point of 18ºC, a boiling point of 351.0±10.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 211.1±6.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 70851-50-2
Jingsj CID: J-9229-2
Molecular Formula: C₂₁H₄₆O₂Si
Chinese Name: 十八烷基甲基二甲氧基硅烷
Molecular Weight: 358.674 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	18ºC
Boiling Point	351.0±10.0 °C at 760 mmHg
Density	0.8±0.1 g/cm3
Flash Point	211.1±6.6 °C

Frequently Asked Questions

What is the CAS number of Dimethoxymethyloctadecylsilane?

The CAS number of Dimethoxymethyloctadecylsilane is 70851-50-2.

What are the molecular formula and molecular weight of Dimethoxymethyloctadecylsilane?

Dimethoxymethyloctadecylsilane has molecular formula C21H46O2Si and molecular weight 358.674 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Dimethoxymethyloctadecylsilane (CAS 70851-50-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9229-2 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.