Methyldibromo Glutaronitrile Slechtste Conserveringsmiddel No known benefits Methyldibromo Glutaronitrile at a glance Has preservative properties that helps keep products free of microorganisms Demonstrates a track record of skin sensitization Can cause irritation, dryness and flaking European Union banned usage in cosmetics several years ago Methyldibromo Glutaronitrile description Formaldehyde-releasing preservative that can also be quite sensitising when used in leave-on products. Related ingredients: Formaldehyde-Releasing Preservative