Methylchloroisothiazolinone: The Common Preservative That Could Irritate Your Skin
Methylchloroisothiazolinone (MCI) is a preservative active against bacteria, yeast, and fungi, according to the U.S. Food and Drug Administration (FDA). It is used in the manufacture of water-based cosmetics and personal care products, as well as in industrial processes including paper coatings, detergents, paints, glue, and cutting oils [8].
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