Azo & Diazo Compound Pigments

Azo and Diazo compounds pigments and dyes are specialized kind of pigments most widely use in colored textile and leather articles.

As a consequence of aryl in azo compounds it has vivid colors, especially reds, oranges, and yellows. Therefore, they are used as dyes, and are commonly known as Azo dyes. Some Azo compounds, e.g., methyl orange, are used as acid-base indicators due to the different colors of their acid and salt forms. Most DVD-R/+R and some CD-R discs use blue azo dye as the recording layer.

Azo pigments consist of colorless particles (typically earths or clays) colored using an azo compound. Azo pigments are important in a variety of paints including artist's paints. They have excellent coloring properties, again mainly in the yellow to red range, as well as good light fastness. The light fastness depends not only on the properties of the organic azo compound, but also on the way they have been absorbed on the pigment carrier.

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