1-bromo-4-iodobenzene

1-Bromo-4-iodobenzene (CAS 589-87-7), also known as p-bromoiodobenzene, is a dual-halogenated aromatic building block used across pharmaceutical synthesis and specialty chemical manufacturing. The presence of two distinct halogen substituents on the benzene ring allows selective cross-coupling reactions, making it a practical starting material for constructing complex molecular architectures.

In pharmaceutical intermediate synthesis, it serves as a key precursor in palladium-catalyzed reactions where chemists exploit the differential reactivity of bromine and iodine to achieve regioselective functionalization. Polymer and materials chemists use it to introduce halogenated aryl units into flame-retardant polymer systems, particularly where controlled halogen loading is required for specific industrial applications.

In dye and pigment manufacturing, it functions as a reactive intermediate for producing brominated and iodinated aromatic colorants used in various textile and leather applications across the globe. It also supports the development of specialty monomers and cross-linkers in advanced polymer formulations targeting specific thermal or electronic performance profiles for high-tech manufacturing sectors.

1-Bromo-4-iodobenzene is supplied as a white to off-white crystalline solid. It is available in technical and high-purity grades, with purity levels typically ranging from 98% to 99%+ for fine chemical synthesis. Packaging options generally range from small laboratory quantities up to multi-kilogram lots for industrial procurement, ensuring reliable supply chains for both research and large-scale production needs.