1,4-Bis[(trimethylsilyl)ethynyl]benzene

1,4-双[(三甲基硅基)乙炔基]苯

Also known as: 1,4-bis[2-(trimethylsilyl)ethynyl]benzene, trimethyl-[2-[4-(2-trimethylsilylethynyl)phenyl]ethynyl]silane, MFCD00135433, TIMTEC-BB SBB009009, 1,4-Bis(trimethylsilyl)ethynylbenzene

1,4-Bis[(trimethylsilyl)ethynyl]benzene (CAS 17938-13-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C16H22Si2 and a molecular weight of 270.51700 g/mol. It is also known as 1,4-bis[2-(trimethylsilyl)ethynyl]benzene, trimethyl-[2-[4-(2-trimethylsilylethynyl)phenyl]ethynyl]silane and MFCD00135433. Key properties include a melting point of 119 °C, a boiling point of 292.1ºC at 760mmHg, a density of 0.92g/cm3 and a flash point of 112.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 17938-13-5
Jingsj CID: J-49972-1
Molecular Formula: C₁₆H₂₂Si₂
Chinese Name: 1,4-双[(三甲基硅基)乙炔基]苯
Molecular Weight: 270.51700 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	119 °C
Boiling Point	292.1ºC at 760mmHg
Density	0.92g/cm3
Flash Point	112.2ºC

Frequently Asked Questions

What is the CAS number of 1,4-Bis[(trimethylsilyl)ethynyl]benzene?

The CAS number of 1,4-Bis[(trimethylsilyl)ethynyl]benzene is 17938-13-5.

What are the molecular formula and molecular weight of 1,4-Bis[(trimethylsilyl)ethynyl]benzene?

1,4-Bis[(trimethylsilyl)ethynyl]benzene has molecular formula C16H22Si2 and molecular weight 270.51700 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. "1,4-Bis[(trimethylsilyl)ethynyl]benzene (CAS 17938-13-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49972-1 (accessed 2026-10-22).

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