Preparation
3,4′-Disulfo-4-aininoazobenzene diazo, and m-Toluidine coupling, again diazo, and m-Toluidine coupling, and then will light product for gasification.
Properties and Applications
dark orange to brown. Soluble in water and ethanol for orange brown. In the dark for the strong sulfuric acid (+ Light red purple), diluted for brown. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution have orange brown precipitation.
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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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1
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5
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5-6
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2
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2
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AATCC
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2-3
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3
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5
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2
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2
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![tetrasodium 2,2'-[carbonylbis[imino(2-methyl-4,1-phenylene)azo(2-methyl-4,1-phenylene)azo]]bis[5-[(4-sulphonatophenyl)azo]benzenesulphonate] Structure](https://www.chemicalbook.com/CAS/GIF/6854-81-5.gif)