Sulfur dyes are often made of
azo compounds, sulfide structures, or anthraquinones, and they have several -C=O, -NH-, and aromatic groups.
New quantitative structure-activity relationship models improve predictability of Ames mutagenicity for aromatic
azo compounds. Toxicol Sci 153, 316-326.
The most common artificial food dyes, the azo dyes, contain aromatic
azo compounds such as tartrazine and are widely used.
Azo compounds are formed from arenediazonium ions conjugated through an azo linkage to highly reactive aromatic hydrocarbon compounds containing two aromatic rings, which are responsible for their intense colours (Solomon, 1996).
nCore modified
azo compounds reportedly permit improved control of gas generation.
Only approved food colors can be used and others, such as some
azo compounds (otherwise known as "Sudan dyes"), are banned because of their potential carcinogenicity.
can bring about the reduction of
azo compounds. Ogawa et al studied about the reduction of
azo compounds and found that sodium sulphite reduces them to hydrazo derivatives and then gradually to amines, whereas Sn[Cl.sub.2] reduces
azo compounds directly to amines [10].