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Iodopropynyl Butylcarbamate

What-it-does: preservative

Official CosIng Information


It's one of those things that help your cosmetics not to go wrong too soon, aka a preservative. Its strong point is being effective against yeasts and molds, and as a nice bonus seems to be non-comedogenic as well.

It is safe in concentrations of less than 0.1% but is acutely toxic when inhaled, so it's not the proper preservative choice for aerosol formulas like hairsprays. Used at 0.1%, Iodopropynyl Butylcarbamate has an extremely low rate of skin-irritation when applied directly for 24 hours (around 0.1% of 4,883 participants) and after 48 hours that figure was 0.5%, so it counts as mild and safe unless your skin is super-duper sensitive.

Show me some proof

  • Lanigan, Rebecca S. "Final report on the safety assessment of iodopropynyl butylcarbamate (IPBC)." International Journal of Toxicology 17.5_suppl (1998): 1-37.

Products with Iodopropynyl Butylcarbamate

Cetaphil Gentle Cleansing Cloths Liz Milano Wrinkle Fighter Rhea Hyaluronic Acid Serum CULLUN Tropical Bio-Toning Essence Equate Beauty Makeup Remover Wipes HydroSkinCare Ha² Serum Mecca Cosmetica To Save Face Spf50+ Superscreen Oxybenzone Free Formula Hick’s Total Transformations Hick’s Edges PCA Skin Weightless Protection Spf 45 Almar sales Co. Simply Bootiful Makeup Removing And Cleansing Wipes CULLUN Gentle Facial Cleansing Gel CÉLETEQUE DERMOSCIENCE ™ Hydration Alcohol-Free Toner EltaMD Uv Physical Tinted Face Sunscreen Spf 41 KitosCell Gel MINISO Olive Moisturizing Spray Olay Resurfacing Peel Vitamin C + Aha Olay Vitamin C Resurfacing Mask & Resurfacing Peel (Step 2) Simple Kind To Skin Refreshing Face Wash African extracts Roobos Refreshing Toner COLOR WOW Dream Coat Jessicurl Spiralicious Gel Real Chemistry Luminous 3-Minute Peel Simple Refreshing Facial Gel Wash Skin Cleaner Gel Hidratante Somme Institute Boost Warming Mask SunSense Daily Face Spf 50+ Advanced Skin Technology Aqualant Ahava Time To Clear Refreshing Cleansing Gel Alpha Skin Care Essential Renewal Gel With 10% Aha Balay Aloe Vera 99% Soothting Gel Dermedic Normance Elta MD Uv Sport Broad-Spectrum Spf 50 Hada Labo Shirojyun Clear Lotion Hiruscar Post Acne Gel Jessicurl Awe Inspiraling Spray Jessicurl Gentle Lather Shampoo MECCA MAX Off Duty Micellar Water Mecca Cosmetica Clean Slate Micellar Water O’Keeffe’s Healthy Feet Foot Cream AmPro Shine ‘N Jam Silk Edges Bolero Coconut Oil And Sea Salt Facial Wipes Céleteque Dermoscience Hydration Facial Moisturizer Del Indio Papago Tepezcohuite Facial and Body Cream Collagen & Vitamin E Dormer 211 Hyperemollient Cream EltaMD Uv Sport Sunscreen Lotion Spf 50 Hada Labo Gokujyn Cleansing Oil Life Brand Nourishing Facial Sheet Cream Mask Life Brand Vitamin E Cream Love beauty and planet Tea Tree & Vetiver Body Wash Marcelle Cleansing Cream