2-ethynyl-5-methylthiophene
2-乙炔基-5-甲基噻吩
Also known as: 2-ethynyl-5-methyl-thiophene, 5-methyl-2-thienylacetylene, 5-methyl-thien-2-ylacetylene, Thiophene, 2-ethynyl-5-methyl-, Thiophene,2-ethynyl-5-methyl
2-ethynyl-5-methylthiophene (CAS 81294-10-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H6S and a molecular weight of 122.188 g/mol. It is also known as 2-ethynyl-5-methyl-thiophene, 5-methyl-2-thienylacetylene and 5-methyl-thien-2-ylacetylene. Key properties include a boiling point of 181.5±28.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 43.3±10.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 81294-10-2
- Jingsj CID
- J-947740-1
- Molecular Formula
- C7H6S
- Chinese Name
- 2-乙炔基-5-甲基噻吩
- Molecular Weight
- 122.188 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 181.5±28.0 °C at 760 mmHg |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 43.3±10.2 °C |
Frequently Asked Questions
What is the CAS number of 2-ethynyl-5-methylthiophene?
The CAS number of 2-ethynyl-5-methylthiophene is 81294-10-2.
What are the molecular formula and molecular weight of 2-ethynyl-5-methylthiophene?
2-ethynyl-5-methylthiophene has molecular formula C7H6S and molecular weight 122.188 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-ethynyl-5-methylthiophene (CAS 81294-10-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-947740-1 (accessed 2026-10-24).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.