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- [2] AROMATIC SULFONATION .92. SULFONATION OF THE 3 METHYLPHENOLS AND THE 6 DIMETHYLPHENOLS IN CONCENTRATED AQUEOUS SULFURIC-ACID AND THE ISOMERIZATION OF SOME OF THE RESULTING SULFONIC-ACIDS AND OF META-XYLENE-2-SULFONIC AND ORTHO-XYLENE-3-SULFONIC ACID JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1985, (05): : 669 - 675
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