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1-Ethyl-4-ethynylbenzene

Also known as: 1-ETH-1-YNYL-4-ETHYLBENZENE, 1-ETHYL-4-ETH-1-YNYLBENZENE, 1-ETHYL-4-ETHYNYL-BENZENE, 1-ethyl-4-eth-1-ynylbenzene, 4-ETHYLPHENYLACETYLENE, 4-Ethylphenylacetylene, 4-Ethylphenylacetylene 97%, 4-Ethylphenylacetylene97%, 4-ethylphenyl acetylene, BENZENE, 1-ETHYL-4-ETHYNYL-, Benzene, 1-ethyl-4-ethynyl-, Benzene, 1-ethyl-4-ethynyl- (6CI, 9CI), MFCD00173887

1-Ethyl-4-ethynylbenzene (CAS 40307-11-7) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C10H10 and a molecular weight of 130.19 g/mol. Key properties include a boiling point of 183.7±19.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 53.1±15.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
40307-11-7
Jingsj CID
J-31255-0
Molecular Formula
C10H10
Molecular Weight
130.19 g/mol
Category
Aromatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point183.7±19.0 °C at 760 mmHg
Density0.9±0.1 g/cm3
Flash Point53.1±15.6 °C
Exact Mass130.078247
LogP3.39
Vapor Pressure1.0±0.2 mmHg at 25°C
Refractive Index1.527

Frequently Asked Questions

What is the CAS number of 1-Ethyl-4-ethynylbenzene?

The CAS number of 1-Ethyl-4-ethynylbenzene is 40307-11-7.

What are the molecular formula and molecular weight of 1-Ethyl-4-ethynylbenzene?

1-Ethyl-4-ethynylbenzene has molecular formula C10H10 and molecular weight 130.19 g/mol.

What are the upstream and downstream products of 1-Ethyl-4-ethynylbenzene?

For 1-Ethyl-4-ethynylbenzene, Upstream Products: 1-Ethyl-4-iodobenzene, 4-Ethylacetophenone, 4-Ethylbenzaldehyde; Downstream Products: 1-(4-Ethynylphenyl)ethanone, 4-Ethylacetophenone, methyl 4-ethylbenzoate.

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

Last updated:

How to cite: Jingsj. "1-Ethyl-4-ethynylbenzene (CAS 40307-11-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31255-0 (accessed 2026-11-09).

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