الفهرس 
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Abstract
Azo Compouds are by far the most important class of dyes, comprising over 50% of total world dyestuffs production. They have achieved this prominence for the following reasons: they are tinctorially strong azo dyes are about twice the strength of anthraquinone dyes the next most important class of dyes they are usually easy to prepare in a multi-purpose chemical plant from cheap, readily available starting materials, they cover the whole shade range; and they have good fastness properties. the first two features make azo dyes cost effective against most dye classes, especially anthraquinone dyes.