Table of Contents[Hide][Show]What is Iodopropynyl Butylcarbamate?Is It Safe?Proven to Increase Risks of Contact AllergiesSafer, More Nourishing ChoicesWell here we are talking about the potential problems with synthetic preservatives again! Iodopropynyl butylcarbamate (IPBC) is a water-based preservative which—get this—was used originally in the wood and paint industries. It’s now also used in some cosmetics and personal … Continue reading Ingredient Watch List: Iodopropynyl Butylcarbamate, the Toxic Preservative