4-bromo-1,8-naphthalic anhydride

4-Bromo-1,8-naphthalic anhydride (CAS 81-86-7) is a halogenated cyclic anhydride used as a reactive intermediate in the synthesis of naphthalimide-based dyes, fluorescent pigments, and specialty polymers.

Where is 4-bromo-1,8-naphthalic anhydride used?

• Textile and printing: precursor to high-performance fluorescent dyes for fabric brightening and inkjet colorants
• Polymer chemistry: incorporated into polyimide backbones with controlled optical or electronic properties
• Pharmaceutical intermediates: synthesis of bioactive candidates
• Specialty pigments: production of vat dyes
• Solvent dyes for plastics coloration and packaging inks
• The naphthalimide scaffold is elaborated through palladium-catalyzed cross-coupling or nucleophilic substitution at the bromine site.

Good to know: The bromine substituent provides a handle for further functionalization.

Commercial specifications

• Purity specifications commonly ranging from 97% to 99%+ depending on the intended application and specific requirements
• Packaging options range from small laboratory quantities to multi-kilogram industrial lots