发明人王建平,黄志刚,沈红梅. "Method for the Synthesis of 4-[2-[3-[2-(2,4-Dimethylphenyl)diazenyl]-2,4-dihydroxyphenyl]diazenyl]-benzenesulfonic Acid Sodium Salt" [P]. 中国发明专利, 专利号 CN 111526942 B, 授权公告日 2025-05-22.
发明人黄志刚,徐明华,陈志强. "A Process for Preparing High-Purity 4-[2-[3-[2-(2,4-Dimethylphenyl)diazenyl]-2,4-dihydroxyphenyl]diazenyl]-benzenesulfonic Acid Sodium Salt" [P]. 中国发明专利, 专利号 CN 114260699 A, 授权公告日 2024-02-11.
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