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2,5-二氨基甲苯硫酸盐(2,5- TDAS)是现今取代对苯二胺用于高档毛发化妆品中流行染色的主要产品,其中世界著名化妆品公司德国Wella、P&G、Henkel、Goldwell,法国Chimex以及日本花王(Kao)等生产的各类染发剂品牌对2,5-TDAS质量要求甚高、有毒有害杂质控制极严(一般<20mg/kg)。而目前市场对这种高品质2,5-TDAS产品的需求迫切,仅欧、美、日的需求量就超过600t/a,但现行2,5-TDAS的工业化生产均是采用对4-硝基邻甲苯胺,即红色基RL(rb-RL)进行还原的技
2,5-Diaminotoluene Sulfate (2,5-TDAS) is the main product of today’s substituted p-phenylenediamine for the popular dyeing in high-end hair cosmetics. The world-renowned cosmetics company Wella, P & G, Henkel, Goldwell, France Various brands of hair dyes such as Chimex and Kao produce high quality 2,5-TDAS with extremely toxic and hazardous impurities (typically <20 mg / kg). At present, the market demand for such high-quality 2,5-TDAS products is urgent. Only the demand of Europe, the United States and Japan exceeds 600t / a. However, the industrialized production of 2,5-TDAS is based on the use of 4- Base o-toluidine, red base RL (rb-RL) reduction technology