2-Ethynyl-1,4-dimethylbenzene

Also known as: 1-Ethynyl-2,5-dimethylbenzene, 1-ethynyl-2,5-dimethylbenzene, 2,5-Dimethylphenylacetylene, 2,5-dimethylphenylethyne, 2-ETHYNYL-1 4-DIMETHYLBENZENE 97, 2-Ethynyl-1,4-dimethylbenzene 97%, 2-ethynyl-1,4-dimethyl-benzene, 2-ethynyl-p-xylene, Benzene, 2-ethynyl-1,4-dimethyl-, Benzene, 2-ethynyl-1,4-dimethyl- (9CI), Benzene,2-ethynyl-1,4-dimethyl, MFCD05664209

2-Ethynyl-1,4-dimethylbenzene (CAS 74331-70-7) 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 130.18600 g/mol. Key properties include a boiling point of 193-194ºC, a density of 0.914 and a flash point of -13ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 74331-70-7
Jingsj CID: J-1337914-1
Molecular Formula: C₁₀H₁₀
Molecular Weight: 130.18600 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	193-194ºC
Density	0.914
Flash Point	-13ºC
Exact Mass	130.07800
LogP	2.28470
Refractive Index	1.541

Customs & Trade Information

HS Code	2902909090
Summary	2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2-Ethynyl-1,4-dimethylbenzene?

The CAS number of 2-Ethynyl-1,4-dimethylbenzene is 74331-70-7.

What are the molecular formula and molecular weight of 2-Ethynyl-1,4-dimethylbenzene?

2-Ethynyl-1,4-dimethylbenzene has molecular formula C10H10 and molecular weight 130.18600 g/mol.

What are the upstream and downstream products of 2-Ethynyl-1,4-dimethylbenzene?

For 2-Ethynyl-1,4-dimethylbenzene, Upstream Products: 2,5-dimethylstyrene, 2,5-Dimethylbromobenzene, 2-Iodo-1,4-dimethylbenzene.

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. "2-Ethynyl-1,4-dimethylbenzene (CAS 74331-70-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1337914-1 (accessed 2026-11-09).

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