Overview
Dichloropentane (C5H10Cl2) is a chlorinated alkane primarily used as a solvent and intermediate in chemical synthesis. Its two chlorine atoms at terminal positions make it reactive for further derivatization, such as in the production of nylon precursors or crop protection agents. Industrially, it is produced via chlorination of pentane or pentene. The compound's balance of volatility and stability lends itself to applications requiring moderate evaporation rates, though its flammability necessitates careful handling.
Physical and Chemical Properties
As a liquid with a density slightly higher than water, dichloropentane exhibits typical halogenated hydrocarbon properties: low water solubility but high miscibility with most organic solvents. Its boiling point (162-163°C) allows for easy distillation purification. The chlorine atoms impart polarity, enabling participation in nucleophilic substitution reactions. However, the compound is stable under normal storage conditions when protected from moisture and oxidizers. UV-Vis spectra show no significant absorption above 220 nm.
Main Applications
In agrochemical manufacturing, dichloropentane serves as a building block for herbicides and insecticides. It's also employed in pharmaceutical synthesis, particularly for cyclization reactions producing heterocyclic compounds. As a specialty solvent, it finds niche use in polymer research and electronics cleaning formulations. Some manufacturers utilize it as a chain extender in polyurethane production, where it contributes to crosslinking density.
Safety and Storage
Classified as flammable (Flash point ~46°C), dichloropentane requires storage in UN-approved containers with flame arrestors. Secondary containment is recommended to prevent soil contamination in case of leaks. Exposure controls include local exhaust ventilation and chemical-resistant gloves (nitrile or neoprene). Spills should be absorbed with inert material and disposed as hazardous waste. Incompatibilities include strong bases and alkali metals.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification for consistent quality. Key specifications to verify include chlorine content (theoretical 50.3%) and absence of heavy metal contaminants. Bulk shipments typically use 200L steel drums or isotanks. Consider regional regulations—some jurisdictions restrict chlorinated solvents under VOC emission rules. Just-in-time procurement is advised due to shelf-life considerations (typically 24 months unopened).
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