Preparation
N-(3-amino-2-hydroxy-5-nitrophenyl)acetamide diazo, and 5-Methyl-3H-pyrazol-3-one coupling, and then turn it into 1:2 chromium complex.
Properties and Applications
red light orange. Soluble in water, slightly soluble in alcohol. The strong sulfuric acid to dark yellow, to orange diluted. The dye solution to join strong hydrochloric acid have orange precipitation; Add sodium hydroxide into red
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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7
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4-5
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4-5
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4
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4-5
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