C09B45/38 - CPC Classification

Complex metal compounds of azo dyes Preparation from compounds with —OH and —COOH adjacent in the same ring or in peri position

• C09B45/40 » Chromium compounds 0
• C09B45/42 » Copper compounds 0
• C09B45/44 » Cobalt compounds 0
• C09B45/46 » Other metal compounds 0