发明人徐明华,何建平,朱建伟. "一种4,4'-二氨基二苯胺硫酸盐的合成方法" [P]. 中国发明专利, 专利号 CN 112272856 A, 授权公告日 2021-09-06.
发明人郑宇鹏,钱学锋,孙丽萍. "Method for the Synthesis of 4,4'-Diaminodiphenylamine Sulfate" [P]. 中国发明专利, 专利号 CN 117929875 A, 授权公告日 2025-06-22.
发明人李文辉,杨光,陈志强. "A Process for Preparing High-Purity 4,4'-Diaminodiphenylamine Sulfate" [P]. 中国发明专利, 专利号 CN 112712393 B, 授权公告日 2023-02-03.
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