Methylchloroisothiazolinone
Methylchloroisothiazolinone is a preservative ingredient. It’s in 327 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, usually paired with methylisothiazolinone. Rinse-off products only in the EU.
What it does
Contains Methylchloroisothiazolinone: preservative
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 35333, accessed October 22, 2026.
Products that contain Methylchloroisothiazolinone
Head & Shoulders
2 in 1 Citrus fresh
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
Head & shoulders
2 in 1 Classic
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
Aussie
3 MINUTE MIRACLE MOIST DEEP CONDITIONER
Conditioner · Lists fragrance, fragrance allergens, silicones
Aussie
3 Minute Miracle Shine
Lists fragrance, fragrance allergens, drying alcohol, silicones
Origins
A Perfect World Antioxidant Cleanser with White Tea
Lists fragrance allergens, sulfates, coconut derivatives
Herbal Essences
Acondicionador Argan Oil of Morocco
Lists fragrance, fragrance allergens, silicones
Expert Collection
Advanced keratin repair Shampooing complexe triple-actif
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
AgeDefy
AgeDefy Shampooing
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
AgeDefy
AgeDefy soin après-shampoing
Lists fragrance, fragrance allergens, drying alcohol, silicones
Pantene
Ampoules Hair Rescue
Lists fragrance, fragrance allergens, drying alcohol, silicones
Head & Shoulders
Antipelliculaire Réparation & Soin Après-shampooing
Lists fragrance, fragrance allergens, silicones
Head & Shoulders
Après-shampooing antipelliculaire Citrus Fresh
Lists fragrance, fragrance allergens, silicones
Head & Shoulders
Après-shampooing antipelliculaire soin du cuir chevelu sec
Lists fragrance, fragrance allergens, silicones
Unilever
Après-shampooing Blond lumière
Lists fragrance, fragrance allergens, exfoliating acid, silicones, formaldehyde releasers
Head & Shoulders
Après-shampooing Classic
Lists fragrance, fragrance allergens, silicones
Arganatural
argan Shampoo
Shampoo · Lists fragrance, sulfates, coconut derivatives
pantene
au lait 700ml
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
b&bw champange toast shower gel
Lists fragrance, fragrance allergens, sulfates, chemical UV filters
bath and body works iced cinnamon rolls hand soap
Lists fragrance, fragrance allergens, sulfates, chemical UV filters, coconut derivatives
bath ane and body soap
Lists fragrance, fragrance allergens, chemical UV filters
Herbal Essences
Body Envy Volumizing Conditioner
Conditioner · Lists fragrance, fragrance allergens, silicones
Herbal Essences
Body Envy Volumizing Shampoo
Shampoo · Lists fragrance, sulfates, coconut derivatives
body wash
Lists fragrance, sulfates, coconut derivatives
body wash
Lists fragrance, sulfates, coconut derivatives
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