Methylchloroisothiazolinone

The details

Methylchloroisothiazolinone, or MCI, is a synthetic preservative used to protect against the growth of bacteria, yeasts, and fungi in water-based products. MCI is commonly combined with methylisothiazolinone (MI) in a 3:1 ratio. This ingredient is safe in cosmetics when formulated to be non-sensitizing and concentrations must not exceed 7.5 ppm in leave-on products / 15 ppm in rinse-off products. Unfortunately, this ingredient has a well-documented sensitization story. Studies spanning several decades have shown this ingredient + MI to cause skin irritation and allergies. The use of this ingredient varies around the world: This just means this ingredient is most likely non-sensitizing in rinse-off products unless you've been diagnosed with a contact allergy to isothiazolinones.

Effects

Found in (3 products)

Himalaya

Purifying Neem Face Wash

Face Washes

Oil-freeReef safeAlcohol-free+5

Clarins

One-Step Gentle Exfoliating Cleanser with Orange Extract

Exfoliators

Oil-freeAlcohol-freeSilicone-free+1

DRMTLGY

Tingl Exfoliating Pads

Exfoliators

Reef safeAlcohol-freeParaben-free+4