... -DIAZO-2 NAPHTHOL-4-SULFONIC ACIDAPPEARANCE:YELLOW BROWN CRYSTALCONTENT:75%MINPHLC CONTENT:90% MININSOLUBILITY:0.15% MAXFEED ACID:3.5% MAX8-NITRO(HPLC ... ): 4% MAX. CONTENT:80%MINPHLC CONTENT:95% MININSOLUBILITY:0.1% MAXFEED ACID:3% MAX8 ... -NITRO(HPLC): 2% MAX. Use: manufacturing acid mordant dyestuff, such as C.I.Acid black 34,52,82,107,124,170 ...