Follow us on our new Insta page »

Iodopropynyl Butylcarbamate

What-it-does: preservative


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 HydroSkinCare Ha² Serum Hick’s Total Transformations Hick’s Edges PCA Skin Weightless Protection Spf 45 CULLUN Gentle Facial Cleansing Gel COLOR WOW Dream Coat Simple Refreshing Facial Gel Wash SunSense Daily Face Spf 50+ Advanced Skin Technology Aqualant 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 Life Brand Nourishing Facial Sheet Cream Mask Hada Labo Tokyo Super Hydrator Lotion Jamieson Provitamina Moisture Rich Vitamin E Moisturizing Cream 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 Alpha Skin Care Intensive Renewal Serum, 14% Glycolic Aha CÉLETEQUE DERMOSCIENCE Hydration Facial Wash Hada Labo Unscented Hada Labo Tokyo Anti-Aging Face Mask 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 Obagi Nu-Derm Toner Sexylook Intensive Hydrating Cotton Black Mask Care Cera Moisturizing Body Foam Wash Fruitty Rose EltaMD Uv Clear Broad-Spectrum Spf 46 EltaMD Uv Clear Facial Sunscreen Broad-Spectrum Spf 46 EltaMD Uv Daily Broad-Spectrum Spf 40 Neutrogena Make-Up Remover Cleansing Towelettes Real Chemistry Fresh-Start Foaming Cleanser Beekman 1802 Pure Goat Milk Hand Cream - Fragrance Free Dr Ko Dermax Sunscreen E.L.F. Cosmetics Superclarify Cleanser Environ Retinol Serum 3 Freeman Anti Stress Dead Sea Minerals Clay Mask Hada Labo Hydra & Whitening Face Wash Hada Labo Softening & Whitening Face Wash Home Health Hyaluronic Acid Moisturizing Cream