发明人林芳,唐晓军,张德明. "Method for the Synthesis of 4-[2-[3-[2-(2,3-Dimethylphenyl)diazenyl]-2,4-dihydroxyphenyl]diazenyl]-benzenesulfonic Acid Sodium Salt" [P]. 中国发明专利, 专利号 CN 115559225 A, 授权公告日 2020-12-06.
发明人唐晓军,王建平,胡光. "A Process for Preparing High-Purity 4-[2-[3-[2-(2,3-Dimethylphenyl)diazenyl]-2,4-dihydroxyphenyl]diazenyl]-benzenesulfonic Acid Sodium Salt" [P]. 中国发明专利, 专利号 CN 112669444 B, 授权公告日 2019-12-11.
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