Description

Crotyl Bromide is a highly reactive organobromine compound widely used as a versatile alkylating agent and building block in organic synthesis. Its value lies in its ability to introduce the crotyl group, enabling the construction of complex molecular frameworks with specific stereochemistry. This chemical is essential for research and production in the pharmaceutical, agrochemical, and specialty chemical industries, where it serves as a key intermediate for active ingredients and advanced materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of various active pharmaceutical ingredients (APIs), particularly those requiring allylic or crotylic motifs.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents.
• Organic Synthesis Reagent: Employed in alkylation reactions, cross-coupling reactions (e.g., Heck, Suzuki), and as a precursor for other functionalized crotyl derivatives.
• Polymer & Material Science: Serves as a monomer or cross-linking agent in the development of specialty polymers and advanced materials.
• Flavor & Fragrance Industry: Intermediate for the synthesis of certain aroma chemicals and flavor compounds.
• Research & Development: A valuable tool in academic and industrial R&D for exploring new synthetic methodologies and creating novel chemical entities.

Basic Information

Product Name	Crotyl Bromide
CAS No.	4784-77-4
Molecular Formula	C4H7Br
Molecular Weight	135.00 g/mol
Synonyms	1-Bromo-2-butene; (E)-1-Bromo-2-butene; (Z)-1-Bromo-2-butene; 2-Butenyl Bromide; Crotyl Bromide (mixed isomers); 3-Bromobut-1-ene; But-2-en-1-yl bromide
EINECS	225-320-2

Quality Control

Our Crotyl Bromide is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure high purity and consistency. A detailed Certificate of Analysis (COA) is provided, confirming compliance with agreed specifications for identity, assay, and impurity profiles. We support our clients' regulatory needs with full traceability and documentation.

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, ensure containers are kept tightly sealed. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Isomer Ratio (E/Z)	As per customer requirement
Water Content (KF)	≤ 0.5%
Specific Gravity (20°C)	1.35 - 1.40
Refractive Index (n20D)	1.475 - 1.485

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