Schering-Plough Patents Photoprotective Composition
Published August 6, 2007
Patent No. US 7,244,416 B2: A sunscreen composition comprising avobenzone, zinc oxide in an amount from about 6-25% weight and sufficient phenylbenzimidazole sulfonic acid to stabilize the avobenzone against photodegradation, wherein the composition does not contain a diester or polyester of a naphthalene dicarboxylic acid has been patented by Schering-Plough Healthcare products, Memphis, TN.
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