Chemical Properties
Purple sauce color powder. Very soluble in water, solubility in water (100℃) is 200g/L. Aqueous solution is cherry red, no tendency to aggregate at room temperature, adding concentrated hydrochloric acid produces purple sauce-colored precipitate; adding concentrated sodium hydroxide solution is wine red. Slightly soluble in ethanol is purple-red. In concentrated sulfuric acid, it is dark blue light red, after dilution, it is dark red to red light purple; in concentrated nitric acid, it is olive color at the beginning, and quickly change to brown; in concentrated hydrochloric acid, it is red light purple precipitate, and it can be dissolved by dilution with water.
Uses
C.I. Acid red 37 is an acid red dye that can be adsorbed and removed by bentone clay.
Preparation
4-Acetamido-2-aminobenzenesulfonic acid diazo, and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid in acid conditions coupled.
Definition
ChEBI: An organic sodium salt that is the disodium salt of 5-[(4-acetamido-2-sulfophenyl)diazenyl]-6-amino-4-hydroxynaphthalene-2-sulfonic acid. Used along with acid fuchsin as a constituent of the plasma staining solution in Lendrum's Picro-Mallory for fibrin.
Properties and Applications
blue-ray red. Purple powder. It is easy to dissolve in the water, in the 100 ° C of the water solubility of 200 g/L, no solution at room temperature gather tendency, slightly soluble in ethanol purplish red. The strong sulfuric acid dyes in the dark blue for red, diluted with dark red to red light purple; In nitric acid for olive green and quickly into brown; In strong hydrochloric acid is red light purple precipitation, and add water to dissolve the diluted. Its water solution is cherry red, with strong hydrochloric acid into purple caramelprecipitation; Sodium hydroxide solution to add thick red wine. Mainly used for wool, silk and polyamide fiber and its blended fabric dyeing, can be in wool and silk fabric printing directly, can also be used for leather color. This product used for wool textiles, influential, the spell dye worsted products.
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Standard
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Light Fastness
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Soaping
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Persperation Fastness
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Oxygen bleaching
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Fastness to seawater
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Fading
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Stain
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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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5-6
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2
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5
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4
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1
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4
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2
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1
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AATCC
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6
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2
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2
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2
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2-3
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2-3
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2
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2
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References
[1] Baskaralingam P, Pulikesi M, Elango D, et al. Adsorption of acid dye onto organobentonite[J]. Journal of hazardous materials, 2006, 128(2-3): 138-144.
