Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl and substituted aryl groups. They are a commercially important family of azo compounds, i.e. compounds containing the C−N=N−C linkage. [1] .

azo dye, any of a large class of synthetic organic dyes that contain nitrogen as the azo group ―N=N― as part of their molecular structures; more than half the commercial dyes belong to this class.

2023年6月9日 · Azo dyes are the most significant category of synthetic colorants and the most prevalent class of dyes in use today. There are different systems of classification for azo dyes. Disperse dyes, such as Disperse Orange, are included in some classes.

Azo dyes are the largest group of artificial food dyes, including 70% of the organic dyes generated in the world. Moreover, the commonest azo dyes in the food industry have been considered to be the yellow dyes (sunset yellow and tartrazine) and …

Azo dyes represent the largest production volume of dye chemistry today, and their relative importance may even increase in the future. They play a crucial role in the governance of the dye and printing market. These dyes are synthesized from …

2010年4月2日 · Azo dyes are widely used in the food, pharmaceutical, cosmetic, textile, and leather industries. They are synthetic compounds characterized by one (monoazo) or several intramolecular NQN bonds. Azo dyes, if they are systemically absorbed, can be metabolized via azoreductases of intestinal microflora by liver cells and skin surface bacteria ...

2023年2月27日 · Azo dyes are organic compounds that belong to the functional group (N=N). These are one of the most critical colourants in the textile industry. Azo dyes are also known as ice or magic colours, as they need a shallow temperature. These are used for several purposes, including colouring foods, candies, cosmetics, and beverages.

Color additives subject to batch certification are generally synthetic organic dyes, lakes, or pigments. Those for food use are chemically classified as azo, xanthene, triphenylmethane, and...

2012年4月25日 · Classification of Azoic Dye. Cotton fibers are dyed using azo compounds, which are converted into azoic colors. Azoic dyes are not soluble in water and must undergo a chemical reaction on the surface of the fiber to produce color. Typical azoic dye types include the following:

Azo dyes are substances with one or more azo groups (-N=N-) coupled with two mono- or polycyclic aromatic systems in their structure. Unlike most organic compounds, azo dyes possess color; as a result, azo compounds have various usages. They are important and widely utilized as coloring agents in the leather and textile industries [14].