General information

Preservatives that are often found in cosmetics include formaldehyde, quaternium-15, imidazolidinyl urea, diazolidinyl urea, parabens mix, 5-chloro-2-methyl-4-isothiazolin-3-one + 2-methyl-4-isothiazolin-3-one (MCI/MI, Kathon CG), and methyldibromoglutaronitrile (MDBGN, Euxyl K400). Polyhexamethylenebiguanide, a biocide structurally related to hexamidine, is added to cosmetics as a preservative.

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