This standard specifies the quality control requirements for chromophenol AS, including its sampling, test methods, inspection rules, marking, labeling, Encasement, transportation and storage. The molecular formula of chromophenol AS is C < unk > H < unk > O < unk > N, the relative molecular mass is 263.29 (according to the international relative atomic mass in 2009), and the CAS number is 92-77-3. The standard applies to the product mass management of chromophenol AS to ensure that it meets relevant technical and safety requirements in production and use. The normative reference documents cover the preparation of chemical reagents, the melting point determination of dyestuff intermediates, and the sampling of chemical products, etc., to ensure that the mass detection and application of chromophenol AS meet international standards.