化学染料常引起接触性皮炎,如黑安尼林染料最易引起反应,主要由于对位苯二胺的作用。近年来,我们遇到了穿紫红色衣服而发生接触性皮炎者21例。21例患者中,18例接触的是紫红色裤(?),1例接触的是紫红色衬裤,1例接触的是紫红色尿布及尿垫,1例接触的是紫红色单衣。接触后发病时间最短者是在接触后第二天发生反应,最长者50天,其中1例发病时间不明。平均接触后发病时间为11.8天。紫红色布染料属于不溶性偶氮染料,是一种有机染料,含有偶氮基(—N=N—)。偶氮染料主要由两个部分构成,一个是不饱和的基团,如乙烯>C=C<,羰基 Chemical dyes often cause contact dermatitis, such as black Aniline dyes most likely to cause reaction, mainly due to the role of para-phenylenediamine. In recent years, we encountered 21 cases of contact dermatitis wearing purple clothes. Of the 21 patients, 18 had magenta pants (?), 1 had magenta pants, 1 had magenta diapers and a pad, and 1 had magenta underwear. The shortest exposure time is the second day after exposure to the reaction, the longest 50 days, of which 1 case of unknown onset time. The average onset time after exposure was 11.8 days. Fuchsia cloth dyes are insoluble azo dyes, is an organic dye containing azo (-N = N-). Azo dyes are mainly composed of two parts, one is unsaturated groups, such as ethylene> C = C <, carbonyl