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发明人张德明,沈红梅,陈志强. "Method for the Synthesis of Sodium (E)-4-Hydroxy-3-((2-methoxyphenyl)diazenyl)naphthalene-2,7-disulfonate" [P]. 中国发明专利, 专利号 CN 111564132 B, 授权公告日 2015-10-23.
发明人沈红梅,黄志刚,冯建国. "A Process for Preparing High-Purity Sodium (E)-4-Hydroxy-3-((2-methoxyphenyl)diazenyl)naphthalene-2,7-disulfonate" [P]. 中国发明专利, 专利号 CN 114720502 B, 授权公告日 2021-05-20.
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