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Azo dyes comprise 60–70% of all dyes used in food and textile industries. [3] Azo dyes are widely used to treat textiles, leather articles, and some foods. Chemically related derivatives of azo dyes include azo pigments, which are insoluble in water and other solvents. [4] [5]
Azo dyes are dyes with R-N=N-R azo structure as a chromophore. Subcategories. This category has only the following subcategory. D. Diarylide pigments (7 P)
Acid dyes can also be used as food colouring, helping to increase the attractiveness of certain foods, and thus becoming more appealing to customers. Some examples include erythrosine, tartrazine, sunset yellow and allura red, to name a few, many of which are azo dyes. [12] These dyes can be used in frosting, cookies, bread, condiments or drinks.
Azo-eosin Azoeosin G Acid red 4 14710 azo 5858-39-9: Azo Fuchsine 6B Acid violet 7 18055 azo 4321-69-1: Azophloxine: Red 2G Azogeranin B Amidonaphthol red G Acid red 1 Food red 10 18050 azo 3734-67-6: Azorubine: Acid red 14 Food red 3 14720 azo 3567-69-9: Azo violet: Magneson I azo 74-39-5: Azure A: Methylene azure A 52005 thiazin 531-53-3 ...
Therefore, they are used as dyes, and are commonly known as azo dyes, an example of which is Disperse Orange 1. 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. The commercial success of ...
Disperse Blue dyes, especially 106 and 124, are common causes of contact allergy. [6] Disperse Orange 1 is an azo dye. Disperse Red 9 is a red dye derived from anthraquinone. Disperse Red 11, also called C.I. 62015 and 1,4-diamino-2-methoxy anthraquinone, is another anthraquinone dye. Disperse Red 60 is also an anthraquinone dye.
Examples of acid dye are Alizarine Pure Blue B, Acid red 88, etc. Basic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk. Usually acetic acid is added to the dye bath to help the uptake of the dye onto the fiber. Basic dyes are also used in the coloration of paper.
Trypan blue is an azo dye. It is a direct dye for cotton textiles. [3] In biosciences, it is used as a vital stain to selectively colour dead tissues or cells blue. Live cells or tissues with intact cell membranes are not coloured. Since cells are very selective in the compounds that pass through the membrane, in a viable cell trypan blue is ...