Preparation
2-Amino-6-chloro-4-nitrophenol diazo, and Pentane-2,4-dione coupling, and then turn it into 1:2 cobalt complex.
Properties and Applications
bright yellow orange. Soluble in water for red light yellow, and adequate soluble in alcohol for red light yellow. The strong sulfuric acid to dark yellow, diluted the same color. Add sodium hydroxide in aqueous solution for yellow, then to orange precipitation; Join the hydrochloric acid for yellow, then to orange precipitation.
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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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4
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5
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3
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4
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