Active Ingredient History
Methylchloroisothiazolinone is an active ingredient in many preservatives marketed under various brand names. It is effective against gram-positive and gram-negative bacteria, yeast, and fungi. Pure Methylchloroisothiazolinone is not commercially available. Kathon CG contains a mixture of Methylisothiazolinone (MI) and Methylchloroisothiazolinone (MCI) in ratio 3:1. Kathon was used in various rinse-off and leave-on formulations including hair products, shampoos, skin care products, bath products, eye and facial makeup, wet wipes and suntan products. The Commission envisages amending Annex V of the Cosmetics Regulation (EC) No. 1223/2009 to restrict the use of methylchloroisothiazolinone to rinse-off products, as suggested by the SCCS. NCATS
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