Preparation
(a) 4-Aminophenol (or 4-Aminophenol and other compounds) with large excess Sodium sulfide and sulfur in the 180 ~ 210 ℃ heating, (b) Benzene-1,4-diamine and Sodium sulfide and sulfur heating. From other Aminophenol (or Hydroquinone) compounds can also get performance similar black dye.
Properties and Applications
green black. black particles with Schiller. In the water for SAP green, In hydrochloric acid in brown precipitation; In the Sodium hydroxide solution color constant, add zinc powder color fade; In concentrated sulfuric acid for yellow green.
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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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3-4
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3-4
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6
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5
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5
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4
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