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Ingredient

Methylisothiazolinone

A preservative restricted in the EU to rinse-off products only. It has not been permitted in leave-on cosmetics since 2017.

What it does

  • Preservative

    Keeps the product free of microbial growth in use.

What we tell people

  • Subject to a regulatory restriction

    One or more ingredients in this product are restricted in at least one market. The restriction is usually a concentration limit or a limit on the type of product.

    Why: Points at a named instrument rather than implying a general hazard. The specific provision is shown with the ingredient.

Regulatory position

Tied to a named instrument rather than summarised. Presence in an ingredient glossary is not evidence that a substance is permitted at any concentration or for any purpose.

  • EU · restricted

    Regulation (EC) No 1223/2009, Annex V, entry 57

    Maximum 0.0015 % w/w

    Rinse-off products only

    Not permitted in leave-on cosmetic products.

Reference

Also written as
MI, MIT
In our catalogue
9 products

Ingredient reference data © European Union, 1995–2026, reused under CC-BY 4.0. Plain explanations are BeautySignal's own. This is information, not medical advice. How we source this.