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azo dye
(redirected from Azo compound)

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azo dye

Synthetic dye containing the azo group of two nitrogen atoms (NN) connecting aromatic ring compounds. Azo dyes are usually red, brown, or yellow, and make up about half the dyes produced. They are manufactured from aromatic amines.

The azo group arises from a characteristic sequence of two chemical reactions known as diazotization and azo coupling. Diazotization converts an amine (such as aniline) into a diazonium salt, which can then be coupled with another amine to form the azo compound.

The intense colours of azo dyes are due to an extended system of delocalized electrons which includes the azo group itself and the aromatic structures on both sides.



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? Mentioned in ? References in periodicals archive
 
Information on these azo compounds leaked out to Uniroyal in the U.
43 Chemical blowing agents by Plastics Technology
patent: 6,069,202 Issued: May 30, 2000 Inventors: Krishna Venkataswamy and Jacques Horrion Assigned: Advanced Elastomer Systems Scorch retarded, crosslinkable compositions of peroxide or AZO compound curable thermoplastic polymers, elastomeric polymers of mixtures thereof containing hydroquinones, sulfur accelerators and peroxides or AZO compounds U.
Patent News by Rubber World
Super-cell modified azo compounds reportedly permit improved control of gas generation.
Blowing agents by Plastics Technology
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