The EC’s Scientific Committee on Consumer Safety will consider use of preservative methylisothiazolinone in rinse-off products at a higher concentration threshold than previously recommended, as well as the ingredient’s use in leave-on hair products, based on new data supplied by trade group Cosmetics Europe.
In December 2013, the committee adopted the opinion that there is no safe concentration of MI in leave-on products, but the ingredient is safe when used in rinse-off products at concentrations less than or equal to 15 ppm Also see "
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