As a reactive flame retardant, it can be used in unsaturated polyesters, epoxy resins, and other polymer materials to improve their flame retardant properties. Although its effect is slightly inferior to tetrabromophthalic anhydride, its lower cost makes it suitable for applications with moderate flame retardant requirements.
In the synthesis of phthalocyanine pigments and phthalocyanine dyes, it participates in condensation or cyclization reactions as a key intermediate in the preparation of green pigments and fluorescent dyes. Operation must be carried out under an anhydrous and inert atmosphere to avoid hydrolysis.
In the preparation of pesticide intermediates (such as phthalocyanine), it reacts with specific amines or thiols to form sulfur- or nitrogen-containing heterocyclic structures, used in the synthesis of fungicides.
In the production of alkyd resins and fire-retardant paints, it can replace phthalic anhydride to introduce rigid structures and flame-retardant properties, suitable for high-temperature or outdoor weather-resistant coatings.
As an acid anhydride reagent in organic synthesis, it can react with nucleophiles such as alcohols and amines to form esters or amides, often used to construct fine chemicals with chlorinated aromatic skeletons.
