This standard GB/T 3673-1995 specifies the technical requirements, test methods, inspection rules and labels, Encasement, transportation and storage requirements of phthalocyanine green G pigment. Phthalocyanine green G is a polychlorinated copper phthalocyanine pigment made from dry copper phthalocyanine in the melt of aluminum chloride and sodium chloride, catalyzed by copper chloride and passed by chlorine gas. It is mainly used in paints, inks, coatings, printing pulp, rubber, plastics and cultural and educational supplies. The standard includes the experimental formula of the product (C32H20N6Cl5Cu), the relative molecular mass (1058.31), and the determination method of pigment light fastness, thermal stability, residue sieve, Color and water soluble substance to ensure the mass and performance of phthalocyanine green G in various applications.