1,3-Bis[(trimethylsilyl)ethynyl]benzene

Also known as: 1,3-Bis((trimethylsilyl)ethynyl)benzene, 1,3-Bis(trimethylsilyl)ethynylbenzene, 1,3-Bis(2-(trimethylsilyl)ethynyl)benzene, (1,3-Phenylenedi-2,1-ethynediyl)bis(trimethylsilane), (1,3-Phenylenediethyne-2,1-diyl)bis(trimethylsilane), Benzene, 1,3-bis[2-(trimethylsilyl)ethynyl]-, 1,3-bis(2-(trimethylsilyl)ethynyl)benzene, DK284, MFCD00078305, TIMTEC-BB SBB008996, trimethyl-[2-[3-(2-trimethylsilylethynyl)phenyl]ethynyl]silane

1,3-Bis[(trimethylsilyl)ethynyl]benzene (CAS 38170-80-8) 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 270.517 g/mol. Key properties include a melting point of 57 °C, a boiling point of 304.9±38.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 120.9±19.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 38170-80-8
Jingsj CID: J-26611-5
Molecular Formula: C₁₆H₂₂Si₂
Molecular Weight: 270.517 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	57 °C
Boiling Point	304.9±38.0 °C at 760 mmHg
Density	0.9±0.1 g/cm3
Flash Point	120.9±19.8 °C
Exact Mass	270.126007
LogP	6.69
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.506

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 1,3-Bis[(trimethylsilyl)ethynyl]benzene?

The CAS number of 1,3-Bis[(trimethylsilyl)ethynyl]benzene is 38170-80-8.

What are the molecular formula and molecular weight of 1,3-Bis[(trimethylsilyl)ethynyl]benzene?

1,3-Bis[(trimethylsilyl)ethynyl]benzene has molecular formula C16H22Si2 and molecular weight 270.517 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "1,3-Bis[(trimethylsilyl)ethynyl]benzene (CAS 38170-80-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26611-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.