Follow us on our new Insta page »

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 CULLUN Tropical Bio-Toning Essence Equate Beauty Makeup Remover Wipes HydroSkinCare Ha² Serum Hick’s Total Transformations Hick’s Edges PCA Skin Weightless Protection Spf 45 CULLUN Gentle Facial Cleansing Gel Simple Kind To Skin Refreshing Face Wash COLOR WOW Dream Coat Real Chemistry Luminous 3-Minute Peel Simple Refreshing Facial Gel Wash SunSense Daily Face Spf 50+ Advanced Skin Technology Aqualant Ahava Time To Clear Refreshing Cleansing Gel Balay Aloe Vera 99% Soothting Gel Elta MD Uv Sport Broad-Spectrum Spf 50 Mecca Cosmetica Clean Slate Micellar Water AmPro Shine ‘N Jam Silk Edges CÉLETEQUE DERMOSCIENCE Hydration Facial Moisturizer Del Indio Papago Tepezcohuite Facial and Body Cream Collagen & Vitamin E Life Brand Nourishing Facial Sheet Cream Mask Simple Water Boost Micellar Facial Gel Wash Hada Labo Tokyo Super Hydrator Lotion Jamieson Provitamina Moisture Rich Vitamin E Moisturizing Cream La Roche-Posay Effaclar Purifying Cleansing Gel Love beauty and planet Tropical Hydration Shower Gel Coconut Oil & Ylang Ylang Milani Eye Tech Extreme Liquid Eyeliner Nanowhite Fresh Mattifying Moisturiser Pond's Cold Cream Cleanser Ruby Rose Sérum Revitalizante Ice Pearl Hidratante Simple Purifying Facial Wash Alpha Skin Care Intensive Renewal Serum, 14% Glycolic Aha CÉLETEQUE DERMOSCIENCE Hydration Facial Wash Hada Labo Gokujyun Cleansing Oil Hada Labo Unscented Hada Labo Tokyo Anti-Aging Face Mask Maui moisture Thicken & Restore Blow Out Mist O’Keeffe’s Working Hands Hand Cream Pond's Fragrance-Free Cold Cream Sexy Look Intensive Brightening Black Cotton Mask Simple Waterboost Micellar Gel Wash Stratia Soft Touch Aha This Works Deep Sleep Pillow Spray Hada Labo Mild & Sensitive Skin Face Wash PCA Skin Protecting Hydrator Broad Spectrum Spf Simple Kind To Skin Purifying Cleansing Lotion St Ives Radiant Skin Pink Lemon & Mandarin Orange Scrub Dead Sea Spa Magik 24 Hour Marine Miracle Moisturiser Frederick Fekkai Prx Reparatives Mask Global Beauty Care Cucumber Hydrogel Face Mask With Vitamins A,C,E Hado Labo Anti-Aging Hydrator