Ceteareth-20 is an emulsifier that can also be found in moisturizers, conditioners and other cosmetics. It helps bind ingredients together and keep a formula from separating. Over time, it is possible for formulas in a product to separate. Adding emulsifiers helps ensure that products provide the same performance use after use. There is some debate about this ingredient’s use in products applied to the skin, however, since our products are not applied to the skin we believe Ceteareth-20 is acceptable for use in candles.