1. This product is a reactive flame retardant, which can be used for polyester and epoxy resin, but its effect is not as good as tetrabromophthalic anhydride. Tetrachlorophthalic anhydride is also an intermediate for organic synthesis of pesticides (rice blast phthalide), dyes, drugs, plasticizers, fire retardant paints, etc.

2. Used as a phthalocyanine green pigment and intermediate dye-based intermediate, and also as a raw material for alkyd resin.

3. Used as dye intermediate and plasticizer.

4. Used in electroplating and other electronic industries.