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Methylisothiazolinone is a synthetic preservative commonly used in rinse-off cosmetic products to prevent the growth of bacteria and fungi.
No specific concern data available
Safety summary
Generally considered safe in rinse-off products at low concentrations, but has been associated with skin sensitization and allergic reactions in some individuals, especially in leave-on products.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.