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[(4-Methoxyphenyl)ethynyl]trimethylsilane

Also known as: ((4-Methoxyphenyl)ethynyl)trimethylsilane, (p-anisylethynyl)trimethylsilane, 1-(4-methoxyphenyl)-2-(trimethylsilyl)acetylene, 1-methoxy-4-[2-(trimethylsilyl)ethynyl]benzene, 2-(4-methoxyphenyl)-1-ethynyl(trimethyl)silane, 2-(4-methoxyphenyl)-1-trimethylsilyl-ethyne, 2-(4-methoxyphenyl)ethynyl-trimethylsilane, p-methoxyphenylethynyl trimethylsilane, trimethylsilyl-4-methoxyphenylacetylene, MFCD04039887

[(4-Methoxyphenyl)ethynyl]trimethylsilane (CAS 3989-14-8) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H16OSi and a molecular weight of 204.34000 g/mol. Key properties include a boiling point of 96ºC1.5 mm Hg(lit.), a density of 0.957 g/mL at 25ºC(lit.) and a flash point of 94.4 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
3989-14-8
Jingsj CID
J-12063-8
Molecular Formula
C12H16OSi
Molecular Weight
204.34000 g/mol
Category
Aromatic Hydrocarbons
Last updated
11/2/2026
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Physicochemical Properties

Boiling Point96ºC1.5 mm Hg(lit.)
Density0.957 g/mL at 25ºC(lit.)
Flash Point94.4 °C
Exact Mass204.09700
PSA9.23000
LogP2.92410
Refractive Indexn20/D 1.5430(lit.)

Frequently Asked Questions

What is the CAS number of [(4-Methoxyphenyl)ethynyl]trimethylsilane?

The CAS number of [(4-Methoxyphenyl)ethynyl]trimethylsilane is 3989-14-8.

What are the molecular formula and molecular weight of [(4-Methoxyphenyl)ethynyl]trimethylsilane?

[(4-Methoxyphenyl)ethynyl]trimethylsilane has molecular formula C12H16OSi and molecular weight 204.34000 g/mol.

What are the upstream and downstream products of [(4-Methoxyphenyl)ethynyl]trimethylsilane?

For [(4-Methoxyphenyl)ethynyl]trimethylsilane, Upstream Products: 4-Iodoanisole, Trimethylsilylacetylene, 4-Bromoanisole; Downstream Products: 4'-Methoxyflavone, 3-(4-Methoxyphenyl)propiolic acid, 1,3,5-Tris(4-methoxyphenyl)benzene.

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

Last updated:

How to cite: Jingsj. "[(4-Methoxyphenyl)ethynyl]trimethylsilane (CAS 3989-14-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-12063-8 (accessed 2026-11-09).

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