Sigma-Aldrich
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Biocides & Preservatives



ProClin® and Kathon® preservatives are highly effective biocides for controlling microorganisms in biological media. ProClin preservatives are for in vitro clinical diagnostic reagents, and are regulated by the US FDA; any other application is prohibited. Kathon CG/ICP preservatives are intended for non-medical applications only; the US EPA regulates these products, and any in vitro diagnostic application is prohibited.