Methylisothiazolinone
Methylisothiazolinone is a preservative ingredient. It’s in 375 products on Poliage, most often conditioner, shampoo and body wash. Avoid lists on Poliage that include it: none.
Updated October 21, 2026
In plain English
A synthetic preservative used in small amounts in water-based products.
What it does
Contains Methylisothiazolinone: preservative
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 35341, accessed October 22, 2026. Also listed as mit and kathon cg.
Products that contain Methylisothiazolinone
Equate Clear Liquid Hand Soap
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Palmolive
Essential Clean - Lemon Zest
Lists fragrance, sulfates
Arm & Hammer
Essentials Moisturizing Shower Gel
Lists fragrance, sulfates, coconut derivatives
Clinique
Exfoliating Scrub
Exfoliant · Lists exfoliating acid, salicylic acid, coconut derivatives
Maybelline
Facestudio Master Conceal
Concealer · Lists silicones
Herbal Essences
Farb Booster
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Palmolive
Feel the message
Lists fragrance, fragrance allergens, sulfates, salicylic acid, coconut derivatives
Dr Teal’s
Foaming Bath
Lists fragrance, sulfates, silicones, coconut derivatives
Dr Teal’s
Foaming Bath with Pure Epsom Salt Cannabis Sativa Hemp Seed Oil with Essential Oil Blend
Lists fragrance, essential oils, sulfates, silicones
head & shoulders
for men
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
Head & Shoulders
For Men (3 Action Formula)
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
Clinique
For Men Face Scrub
Exfoliant · Lists exfoliating acid, salicylic acid, coconut derivatives
Method
Free + Clear laundry detergent
Lists drying alcohol, sulfates, coconut derivatives
Olay
Fresh Radiance Body Wash with Essence of Birch Water and Lavender
Body wash · Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Olay
Fresh Radiance Body Wash with Essence of Strawberry and Mint
Body wash · Lists fragrance, fragrance allergens, sulfates, coconut derivatives
John Frieda
Frizz Ease Flawlessly Straight Shampooing lisse idéal
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
l-oreal
Fructis Anti-Pelliculaire
Lists fragrance, fragrance allergens, exfoliating acid, essential oils, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Fructis Shampooing fortifiant anti pelliculaire
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Fructis Shampooing fortifiant Matière & Densité
Lists fragrance, fragrance allergens, drying alcohol, sulfates, coconut derivatives
L’Oréal
Gel coiffant aux vitamines Fixation Béton
Lists fragrance, fragrance allergens
Cien
Gel de baño
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cien
Gel de ducha 0%
Lists fragrance, exfoliating acid, sulfates, coconut derivatives
Cosmia
Gel douche gommant
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Colgate-Palmolive
Gel douche gommant doux
Lists fragrance, fragrance allergens, sulfates, salicylic acid, coconut derivatives
Related guides
How to read an ingredient list
What the ingredient list on a beauty product tells you, what the names mean, and what it leaves out, using FDA and EU labeling rules.
Does ingredient order show how much is in a product?
Ingredient lists run from most to least, but only down to 1%. Below that, any order is allowed. What the order shows and what it hides.
How do you patch test a new product?
What the AAD, FDA and DermNet say about testing a small area, the FDA hair dye skin test, in-office patch tests, and contact allergy basics.