Tetrachlorophthalic anhydride is used in medicines, pesticides, phthalocyanine green pigments and phthalocyanine dye intermediates. According to the production situation of tetrachlorophthalic anhydride and the requirements of users, the standard technical indicators are formulated as tetrachlorophthalic anhydride content, melting point range, hexachlorobenzene content, moisture, tetrachlorophthalic acid content, and free acid content. The indicator value is determined based on the product quality ledger of the production enterprise. Based on the existing operating industry standards, the requirements, test methods, inspection rules, marking, packaging, transportation and storage of tetrachlorophthalic anhydride were determined.
T/AQB 51-2023 history
2023T/AQB 51-2023 Tetrachlorophthalic anhydride for industrial use