Overview
1-Bromo-3-chloropropane is a bifunctional halogenated alkane with versatile applications in organic synthesis. As a liquid alkylating agent, it serves as a crucial intermediate for introducing propyl chains with bromo and chloro functional groups into target molecules. Its reactivity stems from the polarized carbon-halogen bonds, enabling nucleophilic substitution reactions. The compound is produced industrially via free-radical bromination of 1-chloropropane or through controlled chlorination of 1-bromopropane. Major global producers include chemical manufacturers in China, India, and the EU, supplying both laboratory-scale and bulk quantities.
Physical and Chemical Properties
This halogenated hydrocarbon exhibits typical properties of short-chain alkyl halides: moderate volatility (vapor pressure ~5 mmHg at 20°C) and limited water solubility (0.5 g/L at 25°C). The simultaneous presence of bromine and chlorine atoms creates an electron-deficient β-carbon susceptible to SN2 reactions. Key chemical behaviors include participation in Grignard reagent formation (using the bromine site) and subsequent displacement of the chlorine moiety. The compound's refractive index (1.485 at 20°C) and flash point (47°C) make it identifiable through standard analytical methods like GC-MS and NMR spectroscopy.
Main Applications
In pharmaceutical manufacturing, 1-bromo-3-chloropropane is a precursor for antidepressants, antifungals, and antiviral drugs where propyl linker groups are required. The agrochemical industry utilizes it for synthesizing certain herbicides and fungicides with targeted delivery properties. Material science applications include its use as a modifying agent for polymers and resins, particularly in creating cross-linked networks. Recent research explores its potential in metal-organic framework (MOF) synthesis and as an alkylating agent in flow chemistry systems.
Safety and Storage
As a Category 2 acute toxicity substance (H301), proper handling requires chemical-resistant gloves (nitrile or neoprene), eye protection, and respiratory equipment if ventilation is inadequate. Spills should be contained with inert absorbents like vermiculite, never washed into drains. Storage recommendations include amber glass or polyethylene containers with PTFE-lined caps, maintained below 30°C. Incompatible materials include strong bases, powdered metals, and oxidizing agents. Shelf life typically exceeds 2 years when properly stored under nitrogen atmosphere.
B2B Procurement Guide
Industrial buyers should specify required purity grades (technical 95% vs. reagent ≥98%), packaging sizes (from 1kg drums to IBC totes), and preferred logistics methods (ADR-regulated transport for bulk shipments). Technical specifications should include residual acid content and peroxide formation potential. Leading manufacturers often provide custom synthesis services for derivative compounds. Payment terms for bulk orders (20+ kg) commonly include LC at sight with 30-60 day delivery windows. Quality certifications to request include ISO 9001 and Responsible Care compliance.
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