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3-Amino-4-methoxybenzenesulfonic acid (2 Moore) diazo, and N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)ureacoupling, Then treated with copper sulfate solution containing ammonia, to convert it to a copper complex in the process of complexation, a methoxy group is replaced by a hydroxyl group.
Product Name:Direct Red 83 100%
Molecular Structure: Double azo class 
Molecular Formula:C33H20N6Na4O17S4
Molecular Weight: 992.77
CAS Registry Number:15418-16-3
Manufacturing Methods : 3-Amino-4-methoxybenzenesulfonic acid (2 Moore) diazo, and N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)ureacoupling, Then treated with copper sulfate solution containing ammonia, to convert it to a copper complex in the process of complexation, a methoxy group is replaced by a hydroxyl group.
Properties and Applications: Blue and red to red light purple. Soluble in water for product red, soluble in ethanol is shallow purple. The strong sulfuric acid forviolet black, diluted red to orange to brown. The dye solution to join strong hydrochloric acid for purplish red color to red sauce, precipitation; Add thick sodium hydroxide solution for wine red, have precipitation.
Counter product:Superlitefast Red 3BL;Tertrodirect Light Violet 2R;Solamine Light Rubine 2BLL;Rubine BL
Use:for dyeing polyester and blended fabrics.dyeing of polyvinyl chloride and acetate fiber
Packing: 25KG Carton
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
Fading | Stain | Fading | Stain | ||||
ISO | 3-4 | 4 | 7 | 3 | 2-3 | ||
AATCC | 4-5 | 3-4 | 6-7 | 2 | 3-4 | ||
