Chemical structure of Solvent Yellow 7, an orange colored azo dye. 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]

偶氮染料(azo dyes，偶氮基两端连接芳基的一类有机化合物)是纺织品服装在印染工艺中应用最广泛的一类合成染料，用于多种天然和合成纤维的染色和印花，也用于油漆、塑料、橡胶等的着色。

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. Depending on other chemical features, these …

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 …

Jan 1, 2020 · In this work, we have presented a very detailed review of the different classification of azo dyes as a function of the number of azo groups and the appropriate functional groups. Then we pointed out some chemical properties of these dyes such as reactivity, isomerization and tautomerism and listed.

Aug 1, 2023 · Azo dyes, including Tartrazine, Sunset Yellow, and Carmoisine, are added to foods to provide color, but they have no value with regard to nutrition, food preservation, or health benefits.

Jun 9, 2023 · 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 …

Apr 2, 2025 · Azo dyes are highly recalcitrant, persistent, and toxic compounds, extensively used in the textile industry. The untreated discharge of dye effluents from the textile industry poses severe ...

Azo dyes, and particularly heterocyclic azo dyes, are a vital kind of the numerous organic chemicals employed in the measurement of metal ions because of their exceptional photometric sensitivity. They belong to aromatic azo compounds, but they make up an individual group of organic reagents, because of their synthesis, their reactivity, and ...