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Atomfair (2E)-4-bromobut-2-enoic acid 4-Bromocrotonic acid C4H5BrO2 CAS 20629-35-0

(2E)-4-bromobut-2-enoic acid (CAS No. 20629-35-0) is a high-purity brominated unsaturated carboxylic acid with the molecular formula C4H5BrO2. This compound is widely utilized in organic synthesis, pharmaceutical research, and material science due to its reactive bromine and carboxylic acid functional groups. With a minimum purity of 98%, it is ideal for precise applications requiring reliable chemical intermediates. The trans -configuration (E-isomer) ensures consistent reactivity in cross-coupling reactions, Michael additions, and other transformations. Packaged under inert conditions to maintain stability, this product is suited for laboratories and industrial-scale processes. Available in various quantities, it includes detailed technical data sheets (TDS) and safety…

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Description

(2E)-4-bromobut-2-enoic acid (CAS No. 20629-35-0) is a high-purity brominated unsaturated carboxylic acid with the molecular formula C4H5BrO2. This compound is widely utilized in organic synthesis, pharmaceutical research, and material science due to its reactive bromine and carboxylic acid functional groups. With a minimum purity of 98%, it is ideal for precise applications requiring reliable chemical intermediates. The trans-configuration (E-isomer) ensures consistent reactivity in cross-coupling reactions, Michael additions, and other transformations. Packaged under inert conditions to maintain stability, this product is suited for laboratories and industrial-scale processes. Available in various quantities, it includes detailed technical data sheets (TDS) and safety documentation (SDS) for compliance.

Properties

  • CAS Number: 20629-35-0
  • Complexity: 87.7
  • IUPAC Name: (E)-4-bromobut-2-enoic acid
  • InChI: InChI=1S/C4H5BrO2/c5-3-1-2-4(6)7/h1-2H,3H2,(H,6,7)/b2-1+
  • InChI Key: DOTGZROJTAUYFQ-OWOJBTEDSA-N
  • Exact Mass: 163.94729
  • Molecular Formula: C4H5BrO2
  • Molecular Weight: 164.99
  • SMILES: C(/C=C/C(=O)O)Br
  • Topological: 37.3
  • Monoisotopic Mass: 163.94729
  • Synonyms: (2E)-4-bromobut-2-enoic acid, 678-082-8, 4-Bromocrotonic acid, 13991-36-1, (E)-4-bromobut-2-enoic acid, 2-Butenoic acid, 4-bromo-, (2E)-, 4-bromobut-2-enoic acid, (E)-4-Bromocrotonic Acid, 20629-35-0, GAMMA-BROMOCROTONIC ACID, trans-4-Bromo-2-butenoic Acid, 2-Butenoic acid, 4-bromo-, MFCD00082701, 4-BROMOCROTONICACID, (2E)-4-Bromo-2-butenoic acid, 2-Butenoic acid, 4-bromo-, (E)-, 4-Bromo crotonic acid, SCHEMBL26710, (E)-4-bromobut-2-enoicacid, (E)-4-Bromo-but-2-enoic acid, DTXSID80878724, 4-Bromocrotonic acid – min 98%, BCP11140, AKOS015831319, (2E) -4- Bromo- 2- butenoic acid, FB46446, AC-30328, AS-19617, DB-006729, B2298, CS-0020044, CS-0356597, EN300-98902, EN300-305575

(2E)-4-bromobut-2-enoic acid serves as a versatile building block in organic synthesis, particularly for introducing bromoalkene motifs into target molecules. It is employed in pharmaceutical research for the development of bioactive compounds and prodrugs. Additionally, its reactive double bond and bromine substituent make it valuable in polymer chemistry and material science applications.

Safety and Hazards

GHS Hazard Statements

  • H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

Precautionary Statements

  • P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, and P501

Hazard Classes and Categories

  • Skin Corr. 1B (100%)

If you are interested or have any questions, please contact us at support@atomfair.com

Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.

Disclaimer

Intended Use & Restrictions

This product is sold exclusively for laboratory research, analytical testing, or non-commercial purposes.

  • Strictly prohibited: Resale, repackaging, or formulation into commercial products.
  • Not approved for human/animal use, diagnostics, or manufacturing (including pharmaceuticals, agrochemicals, or consumer goods).

Patent & Regulatory Compliance

Certain molecules may be protected by active patents or regulatory restrictions.

  • Buyers must independently verify patent status (e.g., via USPTO/EPO/CNIPA) and comply with local laws.
  • Atomfair LLC does not provide legal assurances regarding patent non-infringement or jurisdictional compliance.

Liability Release

By purchasing, the buyer agrees to:

  • Use this product only as permitted by law.
  • Indemnify Atomfair LLC against all claims arising from misuse, patent infringement, or regulatory violations.

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