Methyldibromo Glutaronitrile

Methyldibromo glutaronitrile is a preservative that inhibits the growth of bacteria, fungi, and yeast in cosmetic products. While initially approved for use at higher concentrations, it was found to cause skin sensitization in some individuals, particularly those with eczema-prone skin, leading to reactions like redness and itching. Consequently, the European Union banned its use in both leave-on and rinse-off products; however, current regulations allow for limited usage in rinse-off formulations at low concentrations.