Sudan red dye: a new agent causing type-2 occupational asthma

Background Sudan red or 1-[(2-methoxyphenyl)azo]-2-naphthol is a low molecular weight azoic agent widely used in industry, particularly in the production of hair dyes. The use of this product in the food industry is prohibited due to its potential carcinogenic effect, but no respiratory involvement has been reported to date. Case presentation We present the case of a 46-year-old female patient who had been working in a cosmetics packaging...