Vat Black 9

Preparation

8,16-Pyranthrenedione in nitrobenzene with Dinaphtho[1,2,3-cd:3′,2′,1′-lm]perylene-5,10-dione and 1-Aminoanthracene-9,10-dione in copper oxide and Sodium acetate trihydrate under The existence of condensation, closed loop.

Flammability and Explosibility

Not classified

Properties and Applications

black. Black powder. In concentrated sulfuric acid to purple, black after diluted. Alkaline reduction leuco for dark; Acid reduction leuco for red light brown. Mainly used in cotton fiber dyeing, suitable for suspension pad dyeing, can with other dye spell dye various grey. The main body of the leuco dye yarn. Also can be used for silk and Fiber/cotton blended dyeing, also used for polyester/cotton and polyester/viscose blended fabric dyed black and dark grey.