1. O-Phthalic anhydride is used as an epoxy resin curing agent. O-Phthalic anhydride is an important organic chemical raw material, mainly used in the production of important intermediates of phthalate plasticizers, coatings, saccharin, dyes and organic compounds, insecticides, fungicides, rubber processing aids, Photosensitive materials, etc.
2. O-Phthalic anhydride is used as an analytical reagent. Organic synthesis intermediates. The dye industry is used to prepare important intermediates such as hydrazine, 2-chloroindole, 1,4-dihydroxyindole, and dyes such as phthalocyanine blue BS, phthalocyanine blue BX, and phthalocyanine blue B.
3. O-Phthalic anhydride is an important organic chemical raw material. Used in the synthetic resin industry for the production of polyester resins, amino resins, unsaturated polyester resins, alkyd resins, and the like. The dye industry is used to prepare dye intermediates such as hydrazine, hydrazine dihydroxy hydrazine, and dyes such as phthalocyanine blue BS, phthalocyanine blue BX, and phthalocyanine blue B. The plastics industry is used to prepare plasticizers such as dibutyl phthalate, dioctyl phthalate and mixed esters. It is also an important intermediate for the manufacture of a variety of drugs, paints and organic compounds.
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