You should know
What it is
Concerns
Explained
MI is a preservative and known skin irritant. In the past, MI was used for its ability to prevent bacteria, yeast, and fungi growth in low doses.
Nowadays, you'll most likely see MI combined with Methylchloroisothiazolinone (MCI). Trade names for this combination include Kathon CG or Euxyl K 100.
Since then, numerous studies have shown this ingredient to cause contact dermatitis, or skin irritation.
The use of this ingredient varies around the world:
- The EU has banned this ingredient for leave-on products and it is capped at 0.0015% for rinse-off products.
- The US allows this ingredient in concentrations of up to 15 parts per million (ppm) in rinse-off products and 8 ppm in other products.
- Canada allows this ingredient to be used with MCI in rinse-off products. The combination must not exceed 0.0015%.
People also dislike: Niacinamide, Methylchloroisothiazolinone, Parfum
Also known as: Euxyl K 100, Mi, 5-Chloro-2-Methyl-4-Isothiazolin-3-One, Mc/Mci-Cg, Mc/Mci-886, Kathon , and 5-Chloro-20methyl-3[H2]-Isothiazolinone
Methylisothiazolinone is a rare cosmetic ingredient, with about 1.0% of the products in our database containing it.
What it does:
Community Stats
152 people from our community have liked or disliked this ingredient.
Users who dislike it 💔
Often have the following skin types:
Usually have one or more of the following skin concerns:
Where it's used
Methylisothiazolinone is most often found as ingredient number 22 within an ingredient list.
These are the categories of products that use Methylisothiazolinone the most:
References
Products with Methylisothiazolinone
CosIng Data
- CosIng ID: 35341
- INCI Name: METHYLISOTHIAZOLINONE
- EC #: Â 220-239-6
- All Functions: Preservative
