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Characterization of Sulfonic Acid Isomers of Dehydrothio-p-toluidine

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Abstract:

Dehydrothio-p-toluidine sulfonic acid (DTSA) is commonly used as a dye intermediate. It is typically produced by sulfonation of the product obtained from fusion of p-toluidine and sulfur. In addition to the major component, 2-(4-aminophenyl)-6-methyl-7-benzothiazolyl-sulfonic acid (APM-7-BSA), a commercial sample of DTSA, characterized for the National Toxicology Program, was found to contain sulfonic acid isomers of the major component which have not been described in the chemical literature.

Keywords: Dehydrothio-p-toluidine sulfonic acid isomers; Dye intermediates; High-performance liquid chromatography; Negative ion-fast atom bombardment mass spectrometry

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/0003702884429427

Affiliations: Midwest Research Institute, 425 Volker Boulevard, Kansas City, Missouri 64110

Publication date: May 1, 1988

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