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Azo dyes are synthetic dyes and do not occur naturally. [2] [3] Most azo dyes contain only one azo group but there are some that contain two or three azo groups, called "diazo dyes" and "triazo dyes" respectively. Azo dyes comprise 60–70% of all dyes used in food and textile industries. [3] Azo dyes are widely used to treat textiles, leather ...
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)
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 ...
azo 523-44-4: Acid Red 13: Fast red E Acid red 13 16045 azo 2302-96-7: Acid red 25 Acid red 25 16050 azo 5858-93-5: Acid red 88: Fast red A Acid red 88 15620 azo 1658-56-6: Acid Red 95 Erythrosine Y Diiodofluorescein Acid red 95 45425 xanthene 33239-19-9: Acridine orange: Euchrysine Basic Orange 14 46005 acridine: 494-38-2: Acridine red 3B ...
Alizarine Yellow R is a yellow colored azo dye made by the diazo coupling reaction. It is usually commercially available as a sodium salt. In its pure form, it is a rust-colored solid. [2] It is mainly used as a pH indicator.
Bismarck brown Y also called C.I. 21000 [1] and C.I. Basic Brown 1, [1] is a diazo dye with the idealized formula [(H 2 N) 2 C 6 H 3 N 2] 2 C 6 H 4. The dye is a mixture of closely related compounds. It was one of the earliest azo dyes, being described in 1863 by German chemist Carl Alexander von Martius. It is used in histology for staining ...
It is an azo dye. Congo red is water-soluble, yielding a red colloidal solution; its solubility is greater in organic solvents. The use of Congo red in the textile industry has long been abandoned, primarily because of its carcinogenic properties, [ 1 ] but it is still used for histological staining .
Direct Blue 15 is an organic compound that is classified as an azo dye. It is a dark blue water soluble solid. It is a popular substantive dye, which means that it useful for dying cotton and related cellulosic materials. It is produced by azo coupling of o-dianisidine with the appropriate naphthalene disulfonate. [1]