Preservatives: Iodopropynyl butylcarbamate (IPBC)

Iodopropynyl butylcarbamate (IPBC) is a non-formaldehyde releasing chemical based on iodine. It is effective against fungus and bacteria and can be combined with diazolidinyl urea or parabens to create a broad spectrum preservative.

The Cosmetics Ingredient Review Panel notes it is safe to use at levels equal to or below 0.1% and the EU allows it at up to 0.02% in rinse off products and 0.01% in leave on products. It is not approved for oral hygiene or lip care products, and it is not approved for aerosols (which explains why we're not supposed to use liquid Germall Plus in aerosols as IPBC is one of the preservatives in LGP! We can, however, use it in a mister.)

Out of all the preservatives I've reviewed, the only one I can find that contains IPBC is liquid Germall Plus.