Uses
Eriochrome Black A is an azo dye that can be removed from water by an adsorbent made of magnetic NiFe2O4 nanoparticles.
Preparation
4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazotization, and Naphthalen-2-ol coupling.
Properties and Applications
blue light gray to black. Black powder. Soluble in water for navy blue, in the water solubility 60 g/l (80 ℃), slightly soluble in ethanol and Acetone. In concentrated sulfuric acid for blue, yellow after diluted into light brown; In concentrated nitric acid for red orange. Its aqueous solution for navy blue, join concentrated hydrochloric acid to pale yellow light brown; Join strong caustic into orange brown. Dyeing wool in nitric acid into black light purple, and have a slight white streaks. Mainly used for wool fabric dyeing, also can be used for silk and nylon dyeing, also can be used for wool and a variety of fiber blended fabric dyeing, can be in acetic acid chromium pretreatment of wool fabric direct printing. Also used in the leather dyeing.
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Standard
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Ironing Fastness
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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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Water
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Alkali
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Acid
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ISO
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4-5
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5
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4-5
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5
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5
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5
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AATCC
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4-5
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4-5
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5
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5
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5
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References
[1] Moeinpour F, Alimoradi A, Kazemi M. Efficient removal of Eriochrome black-T from aqueous solution using NiFe 2 O 4 magnetic nanoparticles[J]. Journal of environmental health science and engineering, 2014, 12: 1-7.
