Uses
Direct yellow 34 is a good dyeing agent for cotton fabrics.
Preparation
3-Aminonaphthalene-1,5-disulfonic acid diazo, and 2-Amino-4-methylanisole coupling, and then make the light gasification.
Flammability and Explosibility
Not classified
Properties and Applications
red light yellow. Soluble in water for orange. The strong sulfuric acid for blue, blue black after diluted precipitation. The dye solution to join strong hydrochloric acid have blu-ray black precipitation; Add 10% sodium hydroxide solution have yellow precipitation. Used for cellulose fiber dyeing, 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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3
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5
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6-7
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2-3
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3
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AATCC
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4-5
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3
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5
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3-4
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3
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References
[1] Sawada K, Ueda M. Adsorption behavior of direct dye on cotton in non-aqueous media[J]. Dyes and pigments, 2003, 58(1): 37-40.
![tetrasodium 3,3'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis(naphthalene-1,5-disulphonate) Structure](https://www.chemicalbook.com/CAS/GIF/6420-33-3.gif)
