Preparation
N-(3-aminophenyl)formamide (2 Moore) diazo, and Bis(4-hydroxy-2-sulfonaphthalene-7-yl)amine coupling, and then hydrolysis formex amino.
Properties and Applications
Claret. Soluble in water and ethanol for blue-ray red. The strong sulfuric acid in Red sauce for, diluted solution for Red, dark blue light Red precipitate. The dye solution to join strong hydrochloric acid is Claret precipitation; Add thick sodium hydroxide solution for orange brown.
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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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AATCC
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5
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4
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2
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4
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5
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![disodium 7,7'-iminobis[3-[(3-aminophenyl)azo]-4-hydroxynaphthalene-2-sulphonate] Structure](https://www.chemicalbook.com/CAS/GIF/6420-39-9.gif)