ClassID:

93398

C07C309/74 - CPC Classification

Classification description:

Sulfonic acids; Halides, esters, or anhydrides thereof; Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton to carbon atoms of six-membered aromatic rings being part of condensed ring systems

Recent Application in this class: