Molecular Formula | C32H22N10O8.Cr.Na |
Physical and Chemical Properties | Red powder. Slightly soluble in water, soluble in ethylene glycol ether, DMF, ethanol and other organic solvents, the solution is red. |
Application | leather spray red GL is mainly used for spraying or curtain finishing of natural leather such as pigskin, leather and sheep skin, it is especially suitable for the spraying and coloring of aniline leather. |
production method | with 2-amino -4 (and 5)-nitrophenol, 1-phenyl -3-methyl -5-pyrazolone as raw material, first 2-amino -4 (and 5)-nitrophenol diazotization, it is then coupled with 1-phenyl-3-methyl-5-pyrazolone, followed by addition of chrome alum for complexation, filtration, drying and pulverization to give a dry powder of the original dye. The dry powder raw dye is dissolved in ethanol ether, ethanol mixed solvent, and the solution is obtained by sedimentation and filtration. The dye can be packaged... |