1. Acts 3-Bromophthalic anhydride CAS 82-73-5 as a key aromatic anhydride intermediate, efficiently synthesizing brominated phthalimide derivatives for pharmaceutical raw materials and bioactive heterocyclic compound production.

2. Serves 3-Bromophthalic anhydride as a functional building block in organic synthesis, stably preparing high-performance polyester and polyimide resins for heat-resistant engineering plastic manufacturing.

3. Functions as a fine chemical raw material, reliably fabricating fluorescent dyes and organic synthesis reagents with brominated aromatic skeletons for fine chemical and analytical applications.

Store 3-Bromophthalic anhydride CAS 82-73-5 (white crystalline powder, mp 162-165℃, density 1.89g/cm³, purity ≥99%, moisture/air-sensitive) at 5–25℃ in sealed amber glass/HDPE drums in a cool, dry, dark & well-ventilated area, away from moisture, strong oxidants, strong bases and direct sunlight. Wear nitrile gloves, safety goggles and dust mask; avoid dust inhalation, skin/eye contact and ingestion to prevent mild irritation and corrosive damage. Reseal tightly post-use; dispose of waste per local aromatic anhydride fine chemical environmental regulations.

3-Bromophthalic anhydride CAS 82-73-5 is an industrial brominated aromatic anhydride intermediate, not for direct pure-form human contact or ingestion; undiluted contact causes mild corrosive irritation to skin and mucous membranes, and moisture exposure leads to hydrolysis and product failure.

In regulated use, 3-Bromophthalic anhydride features high bromine substitution purity and excellent acylation reactivity, good solubility in organic solvents, stable properties in sealed dry storage, and the anhydride group enables efficient ring-opening reactions for diversified synthesis with high yield.