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| C.I. Direct Brown 67 Basic information |
| C.I. Direct Brown 67 Chemical Properties |
| C.I. Direct Brown 67 Usage And Synthesis |
Preparation | 4-Aminonaphthalene-1-sulfonic acid (90%), 8-Aminonaphthalene-2-sulfonic acid (10%) diazo, and Naphthalen-1-amine coupling, product to diazo, and Benzene-1,3-diamine coupling. | Properties and Applications | Red light brown. Soluble in water for orange brown, slightly soluble in ethanol for yellow orange brown. The strong sulfuric acid for dark blue black, diluted for brown. The dye solution with strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.
Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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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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2
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4
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2
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1
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1
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| C.I. Direct Brown 67 Preparation Products And Raw materials |
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