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What Are The Properties Of Acid Dyes?

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Priya Singhh
What Are The Properties Of Acid Dyes?

Acid dyes are anionic, solvent in water, and are applied from the acidic bath. The textile acid dyes are powerful for protein fibers like silk, nylon, and modified acrylics. Acid dyes fix to the fibers by hydrogen holding, Vander Waals powers, and ionic linkages.

 

Why it's called Acid Dyes?

 

Acid dyes are sulphuric, or carboxylic acid salts and are applied from an acidic bath and thus the name "acid dyes."

 

Chemical Structure of Acid Dyes

 

These dyes are regularly extremely complex in structure however have large aromatic particles, having a sulphonyl or amino group which makes them soluble in water. The majority of the acid dyes have three main structural molecules:

1. Anthraquinone

2. Azo dye

3. Triphenylmethane

 

Properties of Acid Dyes

 

1. Acid dyes are sodium salts of sulphonic acids, or less often of carboxylic acids, and are hence anionic in the aqueous solution.

2. These dyes are substantive to protein and polyamide fibers.

3. Acid dyes are suitable for polyamide, silk, wool, and modified acrylics.

4. Acid dyes have no affinity for cotton cellulose, henceforth not suitable for cellulosic fibers.

5. They are water-soluble.

 

Classification of Acid Dyes

Because of dyeing characteristics, acid dyes are classified in:

1. Leveling acid dye

2. Fast acid dye

3. Milling acid dye

4. Super milling acid dye

 

Application and Uses of Acid Dyes

 

In textile, acid dyes are effective on protein fibers, for example, wool. They are likewise effective on silk. They are effective in dyeing synthetic fiber like nylon yet of least interest in dyeing some other synthetic fibers.

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