| Identification | Back Directory | [Name]
tetrasodium 7-amino-4-hydroxy-3-[[6(or 7)-sulphonato-4-[[6(or 7)-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthyl]azo]naphthalene-2-sulphonate | [CAS]
33540-94-2 | [Synonyms]
C.I.Direct Blue 74:C.I.34146
tetrasodium 7-amino-4-hydroxy-3-[[6(or 7)-sulphonato-4-[[6(or 7)-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthyl]azo]naphthalene-2-sulphonate
2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-6(or 7)-sulfo-4-6(or 7)-sulfo-4-(3-sulfophenyl)azo-1-naphthalenylazo-1-naphthalenylazo-, tetrasodium salt | [EINECS(EC#)]
251-569-9 | [Molecular Formula]
C36H21N7O13S4.4Na | [MOL File]
33540-94-2.mol | [Molecular Weight]
979.822 |
| Hazard Information | Back Directory | [Preparation]
3-Aminobenzenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid first coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid?second coupling, again diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid third coupling. | [Properties and Applications]
dark blue. Black powder. Soluble in water for red light blue. The strong sulfuric acid for Gray light blue, blue for red after diluted. The dye solution with 10% after sulfuric acid into dark purple; Add 30% sodium hydroxide solution into the red. Water-soluble general, more sensitive to hard. Exhaust the dye sex good, excellent discharge. Copper ions in dyeing, iron ion a slight change color. Used for cotton, viscose and silk dyeing and printing, also can be used for cotton/rayon blended fabric dyeing and printing, also used for paper 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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4
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4
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5
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2-3
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3
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AATCC
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5
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4
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4
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4
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