Butyl bromide

Butyl bromide (CAS 109-65-9), also known as 1-bromobutane, is a reactive alkyl halide used as a chemical building block and alkylating agent across pharmaceutical and industrial manufacturing. Its primary commercial role is introducing a butyl group into target molecules during synthesis, making it a key intermediate in multi-step production processes for various sectors.

In pharmaceutical manufacturing, it is used to synthesize active pharmaceutical ingredients and intermediates where controlled alkylation is required to achieve specific molecular structures. Polymer and plastics producers use it as a precursor in catalyst systems and in the preparation of flame retardant additives for thermoplastic formulations to enhance material safety.

In textile and leather processing, it functions as a chemical intermediate in the production of finishing agents and preservation compounds used to improve the durability of final products. It also serves as a reagent in Grignard reactions, where it reacts with magnesium to form butylmagnesium bromide for downstream organic synthesis and complex chemical transformations.

The material is supplied as a clear liquid in standard packaging including drums and intermediate bulk containers. Technical grade is the most common commercial specification for industrial use. High-purity grades are available to meet pharmaceutical intermediate requirements. Suppliers typically offer material with defined purity thresholds and low water content to support sensitive applications.