Preparation
4-(4-Aminophenyl)benzenamine double nitriding, and aniline diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?and products in the coupling acid conditions coupled, then and 4-Chlorobenzene-1,3-diamine coupling.
Properties and Applications
green and black. For to black soluble in water, soluble in ethanol for blue-ray gray. The strong sulfuric acid solution for the red light in blue, diluted red for sauce; In strong hydrochloric acid for purple solution. The dye solution to join strong hydrochloric acid have sauce red precipitate; Add thick sodium hydroxide solution for blue-ray gray, 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
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5
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3
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1-2
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2
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