Direct Purple 66

Product Name:Direct Violet 66 100% 
Molecular Structure: Double azo class 
 
Molecular Formula:C₃₂H₂₃N₇Na₂O₁₄S₄ 
Molecular Weight: 903.81 
CAS Registry Number:6798-03-4 
Manufacturing Methods : 3-Amino-4-hydroxybenzenesulfonamide (2 Moore) diazo, and Bis(4-hydroxy-2-sulfonaphthalene-7-yl)amine coupling, and then into a double copper complex. 
Properties and Applications: purple. Soluble in water for red light purple. The strong sulfuric acid for blue, purple for red after diluted. The dye solution to join 10% hydrochloric acid has the purple precipitation; Add 10% sodium hydroxide solution for blue purple. 
Counter product:Indosol Violet SF-B ;Intralite Fast Violet 5BLL;Solophenyl Violet 4BLE;Direct Fast Violet L5A 
Use:for dyeing and printing of cotton,viscose,silk and cellulose fabrics. 
Packing: 25KG Carton