4-Bromocrotonic acid
Also known as: (E)-4-Bromocrotonic acid, trans-4-Bromo-2-butenoic acid, (2E)-4-Bromo-2-butenoic acid, (E)-4-bromobut-2-enoic acid, 4-Bromobut-2-enoic acid, gamma-Bromocrotonic acid, Remimazolam Impurity 4
4-Bromocrotonic acid (CAS 13991-36-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H5BrO2 and a molecular weight of 164.985 g/mol. Key properties include a melting point of 74ºC, a boiling point of 287.6±23.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 127.7±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 13991-36-1
- Jingsj CID
- J-3312-5
- Molecular Formula
- C4H5BrO2
- Molecular Weight
- 164.985 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 74ºC |
|---|---|
| Boiling Point | 287.6±23.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 127.7±22.6 °C |
| Exact Mass | 163.947281 |
| PSA | 37.30000 |
| LogP | 1.12 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.536 |
| Storage Conditions | Refrigerator |
Customs & Trade Information
| HS Code | 2916190090 |
|---|---|
| Summary | 2916190090 unsaturated acyclic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:6.5%。general tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Bromocrotonic acid?
The CAS number of 4-Bromocrotonic acid is 13991-36-1.
What are the molecular formula and molecular weight of 4-Bromocrotonic acid?
4-Bromocrotonic acid has molecular formula C4H5BrO2 and molecular weight 164.985 g/mol.
What are the upstream and downstream products of 4-Bromocrotonic acid?
For 4-Bromocrotonic acid, Upstream Products: Crotonic acid, Methyl 4-bromocrotonate, N-Bromosuccinimide; Downstream Products: trans-2-Undecenoic acid, Methyl 4-bromocrotonate, trans-2-Hexenoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Bromocrotonic acid (CAS 13991-36-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3312-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.