Preparation
m-Toluidine , p-Methylaniline,O-Methylaniline?mixed diazotization, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
red light orange. Soluble in water for orange red, soluble in ethanol for orange, insoluble in benzene. The strong sulfuric acid as red, diluted for orange; In nitric acid solution for yellow in red. In water solution to join strong hydrochloric acid for orange red; Add thick sodium hydroxide solution for palm orange. Used for wool, silk fiber dyeing, etc. The dye red light for Barium salt orange, used for paper coating and printing inks.
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Standard
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Light Fastness
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Soaping
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Persperation Fastness
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Oxygen bleaching
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Fastness to seawater
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Fading
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Stain
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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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4
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3
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3
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4
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2
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2
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4
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3
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