C09B1/52 - CPC Classification

Dyes with anthracene nucleus not condensed with any other ring; Amino-hydroxy-anthraquinones; Ethers and esters thereof sulfonated

• C09B1/521 » {unsubstituted amino and hydroxy groups} 0
• C09B1/523 » {N-substituted amino and hydroxy anthraquinone} 0