Description

4-Bromo-1 Butene is a versatile halogenated alkene building block, essential for introducing the 4-bromobutyl moiety into complex molecular frameworks. Its high reactivity, particularly in cross-coupling and nucleophilic substitution reactions, makes it a critical intermediate for advanced synthesis. This compound is primarily sought after by R&D laboratories and production facilities in the pharmaceutical, agrochemical, and specialty chemical industries for constructing active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs), especially those requiring a functionalized butyl chain.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators.
• Liquid Crystal & OLED Material Production: Serves as a building block for creating advanced organic electronic materials.
• Polymer Modification: Employed to introduce bromine functional groups into polymers for flame retardancy or further chemical modification.
• Organic Synthesis Reagent: Utilized in palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Heck) and as an alkylating agent in nucleophilic substitutions.
• Flavor & Fragrance Industry: Acts as an intermediate for synthesizing specific aroma chemicals.

Basic Information

Product Name	4-Bromo-1 Butene
CAS No.	25068-17-1
Molecular Formula	C4H7Br
Molecular Weight	135.00 g/mol
Synonyms	1-Butene, 4-bromo-; 4-Bromobut-1-ene; 4-Bromobutene; But-3-enyl bromide; 3-Butenyl bromide; (3-Butenyl)bromide; 1-Bromo-3-butene; NSC 9376
EINECS	246-617-9

Quality Control

Our 4-Bromo-1 Butene is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, HPLC, and NMR, to ensure high purity and consistency. We provide comprehensive Certificates of Analysis (COA) with every shipment, detailing all critical specifications. Our quality commitment ensures the material meets the stringent requirements for research and commercial synthesis applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Due to its highly volatile nature, keep containers tightly sealed when not in use. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Density (20°C)	1.30 - 1.35 g/mL
Boiling Point	~ 100-102°C

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