Chemical Properties
Black powder. Water solubility is general, dissolved in water is green, insoluble in organic solvents. Yellowish green in concentrated sulfuric acid, dark blue precipitate when diluted, greenish yellow when reduced with zinc and ammonia. It is yellowish when stained with copper ions and slightly darker and lighter when stained with iron ions.
Uses
C.I. Direct green 26 is a good dyeing agent for cotton fabrics.
Preparation
2,4,6-Trichloro-1,3,5-triazine in turn and (1) 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid, (2) 4-Nitrobenzenamine diazo, and 2-Hydroxybenzoic acid coupling, and then to restore the azo dyes, (3) aniline for condensation, and for this coupling components (A), 4-Amino-5-hydroxynaphthalene-2,7-disulfonic aciddiazo, and 2-Amino-4-methylanisole coupling, its product to diazo, and the generation of coupling components (A) coupled.
Flammability and Explosibility
Non flammable
Properties and Applications
blue light green. Soluble in water for the green, solubility of 20 g/L (80 ~ 85 ℃), insoluble in organic solvents. The strong sulfuric acid for yellow green, dark blue after diluted precipitation, with zinc and ammonia reduction for green light yellow. In dyeing of copper (colored light yellow, iron ion in a dark colored. Is very sensitive to that fights. Can be used for cotton, viscose, silk and PVA/rayon blended fabric dyeing and printing directly, also used in leather, paper and regenerated celluloee fiber film color.
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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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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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3
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4
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6
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4
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4
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AATCC
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4
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3
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5
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4
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4
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References
[1] Sawada K, Ueda M. Adsorption behavior of direct dye on cotton in non-aqueous media[J]. Dyes and pigments, 2003, 58(1): 37-40.
