(E)-2-Butenoyl chloride
Also known as: Crotonoyl chloride, trans-Crotonyl chloride, 2-Butenoyl chloride, Crotonic acid chloride, (E)-CH3CH=CHCOCl, trans-2-Butenoyl chloride, E-Crotonyl chloride, 2-Crotonoyl chloride
(E)-2-Butenoyl chloride (CAS 625-35-4) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H5ClO and a molecular weight of 104.535 g/mol. Key properties include a boiling point of 124.5±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 35.0±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H314 — Causes severe skin burns and eye damage and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 625-35-4
- Jingsj CID
- J-1992216-0
- Molecular Formula
- C4H5ClO
- Molecular Weight
- 104.535 g/mol
- Category
- Organohalogen Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 124.5±0.0 °C at 760 mmHg |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 35.0±0.0 °C |
| Exact Mass | 104.002892 |
| PSA | 17.07000 |
| LogP | 1.58 |
| Vapor Pressure | 12.7±0.2 mmHg at 25°C |
| Refractive Index | 1.441 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H314 — Causes severe skin burns and eye damage
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of (E)-2-Butenoyl chloride?
The CAS number of (E)-2-Butenoyl chloride is 625-35-4.
What are the molecular formula and molecular weight of (E)-2-Butenoyl chloride?
(E)-2-Butenoyl chloride has molecular formula C4H5ClO and molecular weight 104.535 g/mol.
Is (E)-2-Butenoyl chloride hazardous?
(E)-2-Butenoyl chloride has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H314 — Causes severe skin burns and eye damage; H335 — May cause respiratory irritation.
What are the upstream and downstream products of (E)-2-Butenoyl chloride?
For (E)-2-Butenoyl chloride, Upstream Products: Crotonic acid, (E)-2-Butenoic acid, Benzoyl chloride; Downstream Products: 3-Methyl-1-indanone, Methyl 3-butenoate, Methyl crotonate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "(E)-2-Butenoyl chloride (CAS 625-35-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1992216-0 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.