Coal tar extract with reduced aromatic hydrocarbon content, method for obtaining same and dermatological and cosmetic compositions
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United States of America Patent
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Nov 20, 2001
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Sep 10, 1999
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Mar 11, 1997
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Abstract
The invention concerns a coal tar extract with reduced polycyclic aromatic hydrocarbon and benzo(a)pyrene content and a method for obtaining same using two sequentially linked distillation systems. The invention also concerns cosmetic and dermatological preparations containing said resulting coal tar extract.
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