1-ethynyl-2-methoxybenzene

Also known as: 2-methoxyphenylacetylene, 2-ethynylanisole, 2'-Methoxyphenyl acetylene, 2-Ethynylphenyl methyl ether, Benzene, 1-ethynyl-2-methoxy-

1-ethynyl-2-methoxybenzene (CAS 767-91-9) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C9H8O and a molecular weight of 132.159 g/mol. Key properties include a boiling point of 204.9±23.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 70.0±18.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 767-91-9
Jingsj CID: J-39603-1
Molecular Formula: C₉H₈O
Molecular Weight: 132.159 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	204.9±23.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	70.0±18.3 °C
Exact Mass	132.057510
PSA	9.23000
LogP	2.32
Vapor Pressure	0.4±0.4 mmHg at 25°C
Refractive Index	1.530

Customs & Trade Information

HS Code	2909309090
Summary	2909309090 other aromatic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 1-ethynyl-2-methoxybenzene?

The CAS number of 1-ethynyl-2-methoxybenzene is 767-91-9.

What are the molecular formula and molecular weight of 1-ethynyl-2-methoxybenzene?

1-ethynyl-2-methoxybenzene has molecular formula C9H8O and molecular weight 132.159 g/mol.

What are the upstream and downstream products of 1-ethynyl-2-methoxybenzene?

For 1-ethynyl-2-methoxybenzene, Upstream Products: 2-[(Trimethylsilyl)ethynyl]anisole, 2-iodoanisole, Propiolic acid; Downstream Products: 2-Ethylbenzofuran, 2-Methylbenzofuran, 2-Ethynylphenol.

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-ethynyl-2-methoxybenzene (CAS 767-91-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-39603-1 (accessed 2026-11-07).

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