✨
Sign up free to track ingredients you want to avoid —
every search across FFN auto-hides them.
What it does
A preservative used to prevent microbial growth in personal-care products.
Purpose: preservative
Why it's in these categories
MI / MCI Preservatives
Methylisothiazolinone (MI) and methylchloroisothiazolinone (MCI) are preservatives that have caused a documented contact-allergy epidemic since they replaced parabens in the 2010s.
Community Experience
Of 45 people who reviewed products containing Methylisothiazolinone:
68%
8%
20%
No reaction
31 reports
Minor
4 reports
Moderate
1 reports
Severe
9 reports
Common reactions reported
dizziness · 7
breathing_difficulty · 7
headache · 6
nausea · 5
skin_irritation · 2
Log your experience with this ingredient →
Common aliases
- •and preservatives like Methylisothiazolinone
- •methylisothiazolinone
- •Methylisothiazolinone
- •METHYLISOTHIAZOLINONE
- •methylisothiazolinone (2682-20-4)
- •methylisothiazolinone (preservative)
- + 1 more
All aliases are matched automatically when searching.
Products containing Methylisothiazolinone
27 products
Seventh Generation
Seventh Generation Concentrated Laundry Detergent Liquid Free & Clear Fragrance Free 40 oz
Amazon Basics
Amazon Basics Gel Odor Eliminator, Activated Charcoal, Fragrance Free, 17 Oz, Pack of 1
BabyGanics
Babyganics Foaming Dish Soap, Pump Bottle, Fragrance Free, 16oz, 3 Pack
Clorox
Clorox Free & Clear Multi Surface Cleaner, Spray Bottle, Fragrance Free, 32 Fluid Ounces, Pack of 3
ECOS
ECOS Laundry Detergent Liquid, 100 Loads - Dermatologist Tested Laundry Soap - Hypoallergenic, EPA Safer Choice Certified, Plant-Powered - Free & Clear, 50 Fl Oz (Pack of 2)
Seventh Generation
Seventh Generation Dish Liquid Soap Refill Free & Clear Dish Soap for sensitive skin 50 oz, Pack of 3
Other ingredients like Methylisothiazolinone
Sharing tags with Methylisothiazolinone.