Name:C.I.Direct Yellow 69,C.I.25340
Molecular Structure: Double azo class
Molecular Weight: 984.74
CAS Registry Number:6391-32-8
Manufacturing Methods : N,N’-bis(3-carboxy-4-aminophenyl)urea double nitriding, and 4-(3-Oxobutanamido)benzenesulfonic acid (0.35 Moore) and 4-Methoxy-2-(3-oxobutanamido)benzenesulfonic acid (1.65 Moore) coupled. Treatment with diketene 4-Methoxy-2-(3-oxobutanamido)benzenesulfonic acid mixed aqueous solution prepared by coupling the product.
Properties and Applications: yellow to dark yellow. Soluble in water for golden brown, slightly soluble in alcohol. The strong sulfuric acid for lemon yellow, diluted still for lemon yellow. The dye solution to join strong hydrochloric acid did not change; Add thick sodium hydroxide solution has not changed.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
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