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Structural Formula:
Characters:
Flashing red-brown crystal pieces or sand-like, melting point 118 ~ 118.5 ℃ . Soluble in water was yellow orange, soluble in alcohol and soluble fiber element, slightly soluble in acetone, insoluble in benzene. Case of concentrated sulfuric acid yellow, diluted orange; case of nitric acid was orange. Its solution plus sodium hydroxide solution is generated red-brown precipitate in tannin mordant dyeing of cotton fiber was prime on the yellow orange, in the tungsten light, more bright.
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Quality standards HG2-311-80
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Index Name
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Indicators
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Appearance
Strength
Shade
Of water-insoluble impurities
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Bright green block crystal
As the standard of 100 ± 3%
With the standard approximation
≤1%
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By HGB2141-61 set forth in the method for the determination 5mg in 100mL distilled water containing dye solution, the solution when the thickness of 10.00mm absorption curve as shown below:
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Wavelength λ, nm
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440
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460
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480
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500
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520
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540
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560
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580
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Optical density D
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1.190
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1.180
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1.170
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1.135
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0.925
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0.435
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0.153
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0.067
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Uses:
Can be used for silk, acrylic, wool, cotton tannin mordant dyeing, wool and cotton color fastness on the poor, can also be used for direct printing and discharge printing. There is also used for leather, paper, feathers, grass, wood, bamboo and other products of the dye.
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Application Performance:
In the cotton fabric dyeing fastness (grade):
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Sun
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Soaping
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Flooding
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Perspiration
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Ironing
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Friction
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Acid
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Fade
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Staining
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Fade
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Staining
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Fade
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Staining
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Dry
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Wet
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Sulfate
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Acetate
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Sodium
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1～2
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2～3
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3
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4
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2
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2
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2～3
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3
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4～ 5
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2～3
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2～3
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4～5
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1
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In the acrylic on the dyeing fastness (grade):
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Sun
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Perspiration
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Soaping
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Friction
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Ironing
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Dry
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Dry
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Wet
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2
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4～5
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4
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4
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3～4
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4～5
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4
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