Methylchloroisothiazolinone

Our database includes 336 products that contain Methylchloroisothiazolinone.

You should know

What it is

Preservative

Concerns

Irritation
Eczema

Explained

MCI is a preservative and known skin-irritant. It has anti-bacteria anti-fungal properties.

Studies spanning several decades have shown this ingredient to cause skin irritation and allergies.

MCI is commonly combined with methylisothiazolinone (MI). Other names for this mixture include Kathon CG and Euxyl K 100.

The use of this ingredient varies around the world:

  • The EU allows this ingredient in rinse-off products up to 15 parts per million (ppm).
  • The US allows this ingredient in concentrations of up to 15 ppm in both rinse-off and 7.5 ppm leave-on products.
  • Canada allows this ingredient to be used with MI in rinse-off products. The combination must not exceed 0.0015%.

People also dislike: Methylisothiazolinone, Parfum, Niacinamide

Methylchloroisothiazolinone is a rare cosmetic ingredient, with about 0.9% of the products in our database containing it.

What it does:

Preservative

Community Stats

103 people from our community have liked or disliked this ingredient.

Users who dislike it 💔

Often have the following skin types:

Sensitive Dry

Usually have one or more of the following skin concerns:

Seborrheic Dermatitis • Sensitivity • Dryness • Wrinkles

Where it's used

Methylchloroisothiazolinone is most often found as ingredient number 21 within an ingredient list.

These are the categories of products that use Methylchloroisothiazolinone the most:

CosIng Data

  • CosIng ID: 35333
  • INCI Name: METHYLCHLOROISOTHIAZOLINONE
  • EC #:  247-500-7
  • All Functions: Preservative
What is CosIng?

CosIng is the European Commission database for information on cosmetic substances and ingredients.

SkinSort uses CosIng to source some of it's data on ingredient names and functions.