Description

1-Chloro-1-Butene is a versatile halogenated olefin intermediate with the CAS registry number 4461-42-1. This compound is valued for its reactivity as a building block in organic synthesis, enabling the introduction of the chlorobutene moiety into more complex molecules. It serves as a critical raw material for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop new compounds or optimize synthetic routes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and other fine chemicals.
• Agrochemical Synthesis: Serves as a key precursor in the manufacture of herbicides, pesticides, and plant growth regulators.
• Organic Synthesis Building Block: Employed in laboratory and industrial-scale reactions, including alkylation, cross-coupling, and polymerization processes.
• Specialty Polymer Modifier: Can be used to introduce specific functional groups into polymer chains to alter material properties.
• Chemical Research & Development: A valuable reagent for exploring new synthetic methodologies and creating novel chemical entities in R&D settings.
• Flavor & Fragrance Ingredient Synthesis: Acts as an intermediate in the production of certain aroma chemicals.

Basic Information

Product Name	1-Chloro-1-Butene
CAS No.	4461-42-1
Molecular Formula	C4H7Cl
Molecular Weight	90.55 g/mol
Synonyms	1-Butenyl chloride; 1-Chlorobut-1-ene; But-1-en-1-yl chloride; 1-Butene, 1-chloro-; Chlorobutene; 1-Chloro-1-butylene; β-Chlorobutylene
EINECS	224-709-7

Quality Control

Our 1-Chloro-1-Butene is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including purity assay and impurity profiling by GC or HPLC. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

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 when not in use to prevent evaporation and concentration changes. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Density (at 20°C)	0.90 - 0.92 g/mL
Boiling Point	Approx. 84-86°C

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