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What (who) is acid dye - definition
Acid dye
.svg?width=200 "C.I. Acid Blue 25")
DYE THAT IS TYPICALLY APPLIED TO ANIMAL-FIBER OR SYNTHETIC-FIBER TEXTILES IN AN ACIDIC SOLUTION
Acid dyes; Anionic dye
Acid dyes are anionic, soluble in water and are essentially applied from acidic bath. These dyes possess acidic groups, such as SO3H and COOH and are applied on wool, silk and nylon when ionic bond is established between protonated –NH2 group of fibre and acid group of dye.
Triarylmethane dye
![[[Methyl violet]] 2B](https://commons.wikimedia.org/wiki/Special:FilePath/Methyl Violet 2B.png?width=200 "[[Methyl violet]] 2B")
![[[Methyl violet]] 6B](https://commons.wikimedia.org/wiki/Special:FilePath/Methyl Violet 6B.png?width=200 "[[Methyl violet]] 6B")
![Methyl violet 10B]]](https://commons.wikimedia.org/wiki/Special:FilePath/Methyl Violet 10B.png?width=200 "Methyl violet 10B]]")
![[[Pararosaniline]]](https://commons.wikimedia.org/wiki/Special:FilePath/Pararosaniline.png?width=200 "[[Pararosaniline]]")
![[[Fuchsine]] (hydrochloride salt)](https://commons.wikimedia.org/wiki/Special:FilePath/Rosaniline hydrochloride.svg?width=200 "[[Fuchsine]] (hydrochloride salt)")
![[[New fuchsine]] (As chloride)](https://commons.wikimedia.org/wiki/Special:FilePath/Neofuchsin.svg?width=200 "[[New fuchsine]] (As chloride)")
![[[Fuchsine acid]]](https://commons.wikimedia.org/wiki/Special:FilePath/Fuchsine acid vector.svg?width=200 "[[Fuchsine acid]]")
![[[Phenolphthalein]]](https://commons.wikimedia.org/wiki/Special:FilePath/Phenolphthalein-low-pH-2D-skeletal.svg?width=200 "[[Phenolphthalein]]")
![[[Phenol red]]](https://commons.wikimedia.org/wiki/Special:FilePath/Phenol-red-zwitterionic-form-2D-skeletal.png?width=200 "[[Phenol red]]")
![[[Chlorophenol red]]](https://commons.wikimedia.org/wiki/Special:FilePath/Chlorophenol red.png?width=200 "[[Chlorophenol red]]")
![[[Cresol red]]](https://commons.wikimedia.org/wiki/Special:FilePath/Structure of cresol red.png?width=200 "[[Cresol red]]")
![[[Bromocresol purple]]](https://commons.wikimedia.org/wiki/Special:FilePath/Structure of Bromocresol purple.png?width=200 "[[Bromocresol purple]]")
![[[Bromocresol green]]](https://commons.wikimedia.org/wiki/Special:FilePath/Bromocresol green.svg?width=200 "[[Bromocresol green]]")
![[[Malachite green]]](https://commons.wikimedia.org/wiki/Special:FilePath/Malachite green structure.svg ?width=200 "[[Malachite green]]")
![[[Brilliant green (dye)]]](https://commons.wikimedia.org/wiki/Special:FilePath/Structure of the dye brilliant green.png?width=200 "[[Brilliant green (dye)]]")
![[[Brilliant blue FCF]], a common food colorant](https://commons.wikimedia.org/wiki/Special:FilePath/Brilliant Blue FCF(2).svg?width=200 "[[Brilliant blue FCF]], a common food colorant")
![[[Victoria blue B]]](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria blue B with charge.svg?width=200 "[[Victoria blue B]]")
![[[Victoria blue FBR]]](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria blue FBR revised.svg ?width=200 "[[Victoria blue FBR]]")
![[[Victoria blue BO]]](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria blue BO.svg?width=200 "[[Victoria blue BO]]")
![[[Victoria blue FGA]]](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria pure blue FGA revised.svg?width=200 "[[Victoria blue FGA]]")
![[[Victoria blue 4 R]]](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria blue 4 R revised.svg?width=200 "[[Victoria blue 4 R]]")
![[[Victoria blue R]]](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria blue R revised.svg?width=200 "[[Victoria blue R]]")
![[[Eosin B]]](https://commons.wikimedia.org/wiki/Special:FilePath/EosinB.png?width=200 "[[Eosin B]]")
![[[Eosin Y]]](https://commons.wikimedia.org/wiki/Special:FilePath/EosinY.png?width=200 "[[Eosin Y]]")
![[[Rhodamine B]]](https://commons.wikimedia.org/wiki/Special:FilePath/rhodamine B.svg?width=200 "[[Rhodamine B]]")
![[[Rhodamine 123]]](https://commons.wikimedia.org/wiki/Special:FilePath/Rhodamine 123.svg?width=200 "[[Rhodamine 123]]")
![[[Fluorescein]]](https://commons.wikimedia.org/wiki/Special:FilePath/Fluorescein 2.svg ?width=200 "[[Fluorescein]]")
CLASS OF DYE
Triphenylmethane Dye; Triphenylmethane dye; Victoria blue dye
Triarylmethane dyes are synthetic organic compounds containing triphenylmethane backbones. As dyes, these compounds are intensely colored.
Substantive dye
![[[Direct Blue 1]].](https://commons.wikimedia.org/wiki/Special:FilePath/Pontamine sky blue.svg?width=200 "[[Direct Blue 1]].")
![[[Trypan blue]] (Direct Blue 14), which also exhibits medicinal properties.](https://commons.wikimedia.org/wiki/Special:FilePath/TrypanBlueSalt.png?width=200 "[[Trypan blue]] (Direct Blue 14), which also exhibits medicinal properties.")
![[[Direct Blue 15]].](https://commons.wikimedia.org/wiki/Special:FilePath/Direct Blue 15.svg ?width=200 "[[Direct Blue 15]].")
Representative direct dyes
WATER-SOLUBLE DYE THAT ADHERES TO A SUBSTRATE, USUALLY A TEXTILE MATERIAL OR LEATHER, WITHOUT THE USE OF A MORDANT
Direct dyes; Direct dye; Direct cotton dye; Direct cotton dyestuff
A substantive dye or direct dye is a dye that adheres to its substrate, typically a textile, by non-ionic forces.
