C.I.Direct Blue 15,C.I.24400,CAS 2429-74-5,992.81,C34H24N6Na4O16S4,Direct Blue B,Direct Sky Blue FB,Direct Sky Blue 5B
Molecular Weight: 992.81
CAS Registry Number:2429-74-5
Manufacturing Methods : 3,3′-Dimethoxylbenzidine double nitriding, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid(2 Moore) coupled.
Properties and Applications: blue. Blue powder. Soluble in water solution for the red light blue, solubility of 60 g/L (85 ºC), insoluble in organic solvents. Meet strong sulfuric acid as blue light green, diluted red for blue; Meet nitric acid solution for the red light gray. The dye solution to join strong hydrochloric acid for red light blue precipitation; Add thick sodium hydroxide solution for purple, have precipitation. Cellulose fiber of dyeing, the dye well after sex good, in 60 ~ 80 ºC maximum of affinity, discharge the gender is good. Copper ions in dyeing color shade darker. Mainly used for cotton, such as glue the cellulose fibre, silk and rayon / Kam fabric dyeing, also can be used for pulp, biological, film footage of dyeing, can also be used to make the ink.