Uses
Direct Scarlet B is a dye used with textiles. It is a water pollutant, removed via chitin adsorption.
Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first and 7-Hydroxynaphthalene-1,3-disulfonic acid coupling, again with phenol coupling, and then in contain sodium carbonate in aqueous solution of ethanol heating, air pressure,Using Chloroethane to make phenol??hydroxy ethylated?.
Properties and Applications
red. Soluble in water for red, slightly soluble in alcohol, acetone and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for dark purple, after diluted brown precipitation; In nitric acid solution for colourful red. The dye solution to join strong hydrochloric acid have orange brown precipitation; Add thick sodium hydroxide solution for red orange, precipitation.
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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Fading
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Stain
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Fading
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Stain
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ISO
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3-4
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4
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2
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1-2
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1-2
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AATCC
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3
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5
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2-3
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1
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1
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