Check for Different Age (6 available)
Is this kid-friendly to use Methylchloroisothiazolinone?
ℹ️General Overview
For children aged 5 and up (kids, school-age children, preteens and teens): this ingredient can cause allergic skin reactions. The risk is lower than for babies and toddlers but is still real — especially in leave-on products like creams and wipes.
✅What to Do
Avoid products that list methylchloroisothiazolinone, methylisothiazolinone, MI, MCI or Kathon on the label for leave-on use (lotions, creams, baby wipes). For rinse-off products (shampoos, shower gels), the risk is lower but choose alternatives if your child has sensitive skin. If you must try a new product, test a small patch of skin first and wait 24–48 hours. Stop use and see a doctor if your child develops redness, itching, swelling, or a rash.
⚠️Warnings
Watch for signs of an allergic reaction (redness, itching, blisters, or a spreading rash) — these reactions have been reported in children in published case reports. Regulatory reviews and national authorities (for example Health Canada and safety review panels) note this ingredient as a skin sensitizer and have restricted its use in some leave-on products and wipes. Do not use products containing this ingredient on broken or inflamed skin, and avoid wipes or leave-on products that list it.
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Safety Risk Labels
This ingredient has the following documented risks:
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Alternative Names for Methylchloroisothiazolinone
This ingredient may also be listed as:
Always check ingredient labels carefully, as ingredients may be listed under different names.
Products Containing Methylchloroisothiazolinone
This ingredient is found in the following products:
This list shows products that contain Methylchloroisothiazolinone or its alternative names.
Research Articles on Methylchloroisothiazolinone
Scientific research related to this ingredient:
These research articles provide scientific evidence about Methylchloroisothiazolinone safety and effects.
Common Questions About Methylchloroisothiazolinone
Is this kid-friendly to use Methylchloroisothiazolinone?
Use caution with Methylchloroisothiazolinone for 5+ year old children. Some safety concerns have been identified.
What are the immune system risks of Methylchloroisothiazolinone for children?
Could weaken or confuse immune system.
What are the eczema risks of Methylchloroisothiazolinone for children?
Linked to triggering or worsening eczema and similar skin conditions.
What are the irritant risks of Methylchloroisothiazolinone for children?
Can cause skin redness, itchiness, or rashes—especially on sensitive baby skin.
What are the banned risks of Methylchloroisothiazolinone for children?
Banned or heavily restricted in one or more countries.
What are the absorbed risks of Methylchloroisothiazolinone for children?
Can be absorbed through the skin and get into the bloodstream.
What are the builds up risks of Methylchloroisothiazolinone for children?
Builds up in the body over time with repeated use.
What products contain Methylchloroisothiazolinone?
Methylchloroisothiazolinone is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.
When can kids start using products with Methylchloroisothiazolinone?
The appropriate age depends on the specific ingredient properties and concentration. This analysis is for 5+ year old children. Use the age selector above to check other ages.
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