Published December 31, 1944
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STUDIES IN INDIGOID DYES. PART IV
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The 7-methyl derivatives of bis-2-thionapthene-ethylene-indigo and of 2-thionaphthene-I-aceanthryleneindigo have been prepared. Their dyeing shades on wool and on cotton have been found lighter than those obtained from the corresponding 4-, 5- and 6-methyl compounds.