1,2-dichloro-4-ethynylbenzene
3,4-二氯苯乙炔
Also known as: 3,4-Dichlorophenylacetylene, 1,2-Dichloro-4-ethynyl-Benzene, 3,4-DICHLORO-1-ETHYNYLBENZENE, Benzene, 1,2-dichloro-4-ethynyl-, MFCD07783046, OR5185
1,2-dichloro-4-ethynylbenzene (CAS 556112-20-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H4Cl2 and a molecular weight of 171.023 g/mol. It is also known as 3,4-Dichlorophenylacetylene, 1,2-Dichloro-4-ethynyl-Benzene and 3,4-DICHLORO-1-ETHYNYLBENZENE. Key properties include a melting point of 40-42ºC, a boiling point of 225.1±30.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 93.2±18.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 556112-20-0
- Jingsj CID
- J-1365768-6
- Molecular Formula
- C8H4Cl2
- Chinese Name
- 3,4-二氯苯乙炔
- Molecular Weight
- 171.023 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 40-42ºC |
|---|---|
| Boiling Point | 225.1±30.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 93.2±18.1 °C |
Frequently Asked Questions
What is the CAS number of 1,2-dichloro-4-ethynylbenzene?
The CAS number of 1,2-dichloro-4-ethynylbenzene is 556112-20-0.
What are the molecular formula and molecular weight of 1,2-dichloro-4-ethynylbenzene?
1,2-dichloro-4-ethynylbenzene has molecular formula C8H4Cl2 and molecular weight 171.023 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,2-dichloro-4-ethynylbenzene (CAS 556112-20-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1365768-6 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.