Synonyms:Naphthalenesulfonicacid, methyl-, sodium salt (7CI,8CI,9CI); Methylnaphthylene sodium sulfonate;Petro 11; Petro 22; Petro A; Petro AG Special; Petro AG Special Liquid; Sodiummethylnaphthalenesulfonate; Sodium monomethylnaphthalenesulfonate; Supragil MNS90