Description

3-Chloro-3-Methyl-1-Butene is a versatile halogenated olefin intermediate with a reactive allylic chloride moiety, making it a valuable building block in organic synthesis. Its structure offers a unique combination of volatility and reactivity, which is critical for controlled chemical transformations in high-value manufacturing. This compound is primarily sought after by R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty chemical industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for introducing the tert-butyl or other branched alkyl groups via its reactive chloride.
• Agrochemical Synthesis: Used in the manufacture of herbicides, fungicides, and insecticides, where its chlorinated butene structure is incorporated into bioactive molecules.
• Polymer & Resin Modifier: Acts as a monomer or cross-linking agent in the production of specialty polymers, coatings, and adhesives to modify physical properties.
• Organic Synthesis Building Block: Employed in various name reactions (e.g., alkylation, coupling reactions) to create complex organic compounds in academic and industrial research.
• Flavor & Fragrance Ingredient Synthesis: Utilized as an intermediate for producing certain terpene-based aroma chemicals and flavor compounds.
• Lubricant & Fuel Additive Precursor: Functions as a chemical intermediate in the development of performance-enhancing additives for industrial lubricants and fuels.

Basic Information

Product Name	3-Chloro-3-Methyl-1-Butene
CAS No.	2190-48-9
Molecular Formula	C5H9Cl
Molecular Weight	104.58 g/mol
Synonyms	3-Chloro-3-methylbut-1-ene; 1-Butene, 3-chloro-3-methyl-; 3-Methyl-3-chloro-1-butene; tert-Butylvinyl chloride; (Chloromethyl)trimethyl ethylene; 3-Chloro-3-methyl-1-butylene; NSC 9373
EINECS	218-581-7

Quality Control

Every batch of 3-Chloro-3-Methyl-1-Butene is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards and customer-specific requirements. Comprehensive analytical testing, including GC, NMR, and Karl Fischer titration, is performed to verify identity, purity, and impurity profiles. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and product consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials such as strong bases and oxidizing agents. Due to its highly volatile nature, keep containers tightly sealed when not in use. Recommended storage temperature is 2-8°C for long-term stability, though short-term storage at controlled room temperature (15-25°C) is acceptable.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Density (at 20°C)	0.88 - 0.90 g/mL
Refractive Index (n20D)	1.425 - 1.429
Related Substances (GC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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