Description

(E)-1-Bromo-1-Butene is a high-purity, reactive organobromine compound characterized by its terminal alkene and bromine functionality. This specific isomer is a valuable building block in organic synthesis, enabling critical carbon-carbon bond formation and functional group transformations. It is primarily utilized by research chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials industries for the synthesis of complex molecules and intermediates.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex bioactive molecules via cross-coupling reactions like Heck, Suzuki, and Negishi couplings.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where the introduction of a butenyl moiety is required.
• Material Science: Serves as a monomer or functionalization agent in the development of specialty polymers, liquid crystals, and organic electronic materials.
• Organic Synthesis Reagent: Employed in academic and industrial R&D for constructing carbon skeletons, performing allylic substitutions, and as a source of the 1-butenyl group.
• Flavor & Fragrance Chemistry: Used in the synthesis of specific aroma compounds and flavoring agents that require the (E)-configured alkene structure.

Basic Information

Product Name	(E)-1-Bromo-1-Butene
CAS No.	32620-08-9
Molecular Formula	C4H7Br
Molecular Weight	135.00 g/mol
Synonyms	(E)-1-Butenyl Bromide; trans-1-Bromo-1-butene; 1-Bromo-1-butene (E)-; (E)-1-Butene, 1-bromo-; 1-Bromo-trans-1-butene; Bromo-trans-butene; trans-Crotyl Bromide; (E)-Crotyl Bromide
EINECS	Contact for details

Quality Control

Our (E)-1-Bromo-1-Butene is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including GC, NMR, and IR spectroscopy, to ensure high chemical and isomeric purity. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee consistency and meet the stringent requirements of research and process chemistry.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). Keep away from strong acids and incompatible organic solvents. Due to its light-sensitive nature and reactivity, it is recommended to store under an inert atmosphere for long-term stability.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0% (Area %)
Isomeric Purity ((E)-isomer)	≥ 98.0% (by GC or NMR)
Water Content (KF)	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.