Chemical Properties
Orange-red powder. Insoluble in water. Soluble in o-chlorophenol, slightly soluble in hot chloroform and pyridine, insoluble in acetone, ethanol, and toluene. Yellowish-brown in concentrated sulfuric acid; olive-green in alkaline sodium hydrosulfite solution; blue (with green fluorescence) in acidic solution.
Uses
Vat Red 14 can be used for dyeing and printing cotton fabrics. It has moderate affinity and good leveling properties, but it is not suitable for dyeing silk and wool. Its color is more yellow than Vat Red R, but not as bright as Vat Red GGN, so it is used less often.
Preparation
(a) in the Acetic acid glacial or Pyridine solution heating ?Benzene-1,2-diamine?and Naphthalene-1,4,5,8-tetracarboxylic acid?mixture (when using Acetic acid glacial solvent, product of trans-isomer larger proportion); (b), Naphthalene-1,4,5,8-tetracarboxylic acid?and 2-Nitrobenzenamine heating, and then will nitrocellulose reduction, and cyclization, (c) with Benzene-1,2-diamine?(2 Moore) deal with N, N’-diaryl -1,4,5,8 – naphthoate carboximide. Note: cis and trans structure for about 40 ~ 45%. And 60 ~ 55%
Properties and Applications
dark yellow red. Orange powder. Insoluble in water, soluble in 2 – Chlorophenol, slightly soluble in hot Chloroform and Pyridine , not soluble in Acetone, Etanol and Toluene. In concentrated sulfuric acid for yellow brown. Alkaline reduction leuco for olive; Acid reduction leuco with green fluorescent blue. Used for cotton fabric dyeing, for the dark yellow red. To cotton affinity is high, good levelness, to dead cotton covering power is very good. Used for cotton fabric of direct, resist and discharge printing.
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Standard
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Ironing Fastness
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Chlorine bleach
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Light Fastness
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Mercerized
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Oxygen bleach
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Soaping
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Fading
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Stain
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ISO
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4-5
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5
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6-7
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4-5
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3
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4-5
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5
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AATCC
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5
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6-7
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5
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5
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5
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5
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