A French researcher has apparently found that methylisothiazolinone (MI), an antimicrobial widely used in cosmetics and in occupational and household products, is responsible for contact allergies in Europe at a 5.6 to 6-percent prevalence rate. F. Giordano-Labadie, “Methylisothiazolinone: An emerging allergen,” Revue Française d’Allergologie, June 2014. According to the study abstract, “For these reasons, MI at a concentration of 2000ppm in water has recently been included in the European baseline series. Regulatory measures concerning cosmetics are now being discussed at the European level.”