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wur to a star. Thiophene! The high-reactivity route to sulfur c o m pounds. Now available in commercial quantity. This fast-growing intermediate in the big family of Pennwalt organosulfurs undergoes many reactions which cause benzene or cyclopentadiene to either fail, or undergo with extreme difficulty. With its unique combination of sulfur atom, cyclic structure and high reactivity, thiophene can be sulfonated, halogenated, acylated, alkylated and
aminoalkylated. Thiophene has been investigated for use in agricultural and textile chemicals, plastics, drugs and pharmaceuticals, petroleum-treatment compounds . . , many others. Our 250-page bibliography, ' T h i o p h e n e Chemistry," abstracts the most recent literature. For a copy for your research library, write on your company letterhead to Industrial Chemicals Department, Pennwalt Corporation, Three Parkway, Phila., Pa, 19102,
^ PENWALT INDUSTRIAL CHEMICALS
