What is METHYLISOTHIAZOLINONE AND METHYLCHLOROISOTHIAZOLINONE
Methylisothiazolinone (MI) and Methylchloroisothiazolinone (MCI) are chemical preservatives commonly used in cosmetics and personal care products such as shampoos, conditioners, body washes, and lotions. They are added to these products to prevent the growth of bacteria and fungi. However, concerns have emerged regarding their potential health risks, particularly in individuals with sensitive skin.
Both MI and MCI are known skin sensitizers, and they can cause allergic contact dermatitis when applied to the skin, leading to symptoms like redness, itching, and skin rashes. The prevalence of sensitization to these chemicals has increased over the years, prompting regulatory authorities to take action. In the European Union, for example, the concentration of MI in leave-on cosmetic products has been restricted to reduce the risk of adverse skin reactions.
[Souce: Basketter, D. A., et al. (2010). "Recommendations for the Use of Methylisothiazolinone (MI) and Methylchloroisothiazolinone/Methylisothiazolinone (MCI/MI) in Leave-on Cosmetic Products." Contact Dermatitis, 63(1), 1-8.]