In March 2014, the Australian Competition and Consumer Commission (ACCC) prompted the recall of some clothing for having unacceptable concentrations of particular azo dyes.
Azo dyes are organic (carbon) compounds with the general
formula R-N=N-R' and are named after their unusual N=N, azo, functional group.
They are synthetic dyes used to colour foods, cosmetics,
carpets, clothes, leather and textiles.
The azo dye that most Chemistry students will be familiar
with is methyl orange, an acid-base.
Read more in the September 2014 issue of AUS-e-NEWS for the chemistry of Methyl Orange
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