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Methylchloroisothiazolinone

icky
What-it-does: preservative

Details

This totally unpronounceable ingredient (let’s take a shortcut: MCI) is a super effective preservative with both antibacterial and antifungal effects that works at very low concentrations. 

The bad news with it though is that it can sensitize the skin easily (it’s a so-called non-fragrance allergen). It’s not permitted to be used alone, but only with its BFF, methylisothiazolinone (MI), another icky preservative. Together they have a broad spectrum antimicrobial effect but are permitted to be used only in rinse-off products (under 0.0015%).

Products with Methylchloroisothiazolinone

Dove Go Fresh Face Cleanser RENPURE Argan Oil Luxurious Shampoo Telepoint family Rose Scented Hand Soap Alcare Foaming Cleanser Dermachem Sabonete Primer Pré-Maquiagem Erha Acneact Gentle Acne Facial Wash Helena Professional Hair Gel Sutra Beauty Conditioner Bruno Vassari Extra Rich Cleansing Foam Carthage Regeneración + O2 Cotton Tree Baby Wipes Non Parfum GNC Pets Hypoallergenic Shampoo Hidraderm ciclos Serum Vitamina C Hidraderm Ciclos Icono Acido Hialurónico Extracto En Gel Skin doctors Instant Eyelift St. Botanica Argan Oil Ultra Nourishing Body Wash elf cosmetics Clear Lash Brow Mascara BIU Gel De Limpieza Antibacterial Beauty Formulas Tea Tree Face Mask Caviahue Serum C Dermotivin Original Dorothy Gray Gel De Limpieza Facial Dove Dove intense repair shampoo Equate Kids 3-In-1 Shampoo, Conditioner, & Body Wash, Unscented Hollywood By Dr. Rey Anti-Aging Facial Creme Lure Cleansing Gel Lure Facial Scrub Lure Facial Serum Vitamin C SSCPL Herbals Detan Face Pack The natural ritualist Salt Free Shampoo Veganis Leche Extra Humectante Para Manos Y Cuerpo Violetta Essential Exfoliante Gel skinology Niacinamide + 3D Hyaluron Serum Barney Kenet MD Nourishing Conditioner Coast Pacific Force Hair & Body Wash DermDoc Skin Brightening Face Wash FOLICURÉ Shampoo Original G&G teint uniforme Lightening Beauty Oil Guardian Goat’S Milk Moisturising Bath Lure Facial Serum Ácido Hialuronico Manic panic Semi Permanent Hair Colour Cream Plum Passion Oxecure Facial Liquid Cleanser Salon Line Condicionador S.O.S Bomba Skala Expert #Maiscachos Para Crespas E Cacheadas Skin Authority Daily Cleanser Touch me! Please Face Wash Foam With Full Fat Milk V05 Kiwi Lime Squeeze Clarifying Shampoo argan de luxe PROFESSIONAL Argan Oil Nourishing Conditioner medline Soothe & Cool Shampoo And Body Wash not your mother's Curl Talk Activating Mousse