Description

3-Chloro-2-Methyl-1-Butene is a versatile and highly reactive halogenated alkene building block, essential for advanced organic synthesis. Its value lies in its ability to introduce the chloromethylbutene moiety, enabling the construction of complex molecular frameworks for high-value intermediates. This compound is primarily needed by research and development chemists, process engineers, and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex drug molecules.
• Agrochemical Synthesis: Used in the production of pesticides, herbicides, and fungicides, contributing to crop protection agents.
• Organic Synthesis Building Block: Acts as a versatile reagent for alkylation, addition, and polymerization reactions in fine chemical manufacturing.
• Polymer & Resin Modifier: Employed to introduce functional groups into polymer chains, modifying properties like adhesion, flexibility, or reactivity.
• Flavor & Fragrance Ingredient Synthesis: Utilized as an intermediate in creating specific terpene-based aroma compounds.
• Research & Development: Critical for academic and industrial R&D in exploring new synthetic pathways and novel compounds.

Basic Information

Product Name	3-Chloro-2-Methyl-1-Butene
CAS No.	5166-35-8
Molecular Formula	C5H9Cl
Molecular Weight	104.58 g/mol
Synonyms	1-Butene, 3-chloro-2-methyl-; 2-Methyl-3-chloro-1-butene; 3-Chloro-2-methylbut-1-ene; 3-Chloro-2-methylbutene-1; 3-Chloro-2-methyl-1-butylene; NSC 60535; β,β-Dimethylvinyl chloride
EINECS	225-934-6

Quality Control

Our 3-Chloro-2-Methyl-1-Butene is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including GC, NMR, and IR spectroscopy, to ensure high purity and consistent performance. We provide comprehensive Certificates of Analysis (COA) with every shipment, detailing all critical specifications. Our quality systems are designed to support cGMP and ISO standards for traceability and reliability in industrial and research applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat, sparks, and open flame. Due to its highly volatile and strong acid/organic solvent nature, it should be kept separate from incompatible materials such as strong oxidizing agents and bases. Recommended storage temperature is 2-8°C for extended stability, though short-term storage at 15-25°C is acceptable for in-use containers.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Density (at 20°C)	0.90 - 0.92 g/mL
Refractive Index (n20D)	1.430 - 1.435

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