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Abstract
Commercial Sudan III was separated into various fractions by the usual column chromatographic technics using Celite-silicic acid as the adsorbent and commercial petroleum ether (B) as the solvent. By analysis, using both spectrophotometric and paper strip chromatographic methods, it was possible to identify fractions from the commercial sample, including several fractions which were indubitably very highly purified Sudan III. In addition several other fractions containing mixtures of colored components have been isolated.