Flagged ingredient
A potent preservative in rinse-off products. Highly effective against microbes, but a leading cause of contact allergy — it was named Allergen of the Year (2013) and is heavily restricted in leave-on products.
Raters don't agree. Here's where each one stands
—
Yuka
Subscription
INCI Beauty
Ad-supported
EWG Skin Deep
Nonprofit
EWG Skin Deep
Nonprofit
High concern for allergenicity and skin sensitization; one of the most common causes of cosmetic contact dermatitis.
Yuka
Subscription
Flags allergen risk; permitted in rinse-off products under EU limits but recommends avoidance for reactive skin.
Coverage & match quality
9 ratings · 4 of 4 axes
INCI Beauty
Ad-supported
Restricted to rinse-off use under EU rules; listed as a known sensitizer to monitor.