Preparation
will the 4-Chloro-2-(2,4-dinitrophenylamino)phenol?in 45 ~ 70 ℃ in the 90 minutes added to sodium polysulfide, and then heated to boiling point (104 ℃), in the return of boiling 24 hours
Properties and Applications
dark purplish red. Deep red powder. In the sodium sulfide solution for deep blue light green; In concentrated sulfuric acid for brown light green, dilution after purple black precipitation. Used for cotton, hemp, viscose fabric such as dyeing.
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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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Fulling
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Persperation Fastness
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Soaping
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Moderate
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Severe
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ISO
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4
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4
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3
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3-4
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2-3
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