A fatty alcohol emulsifier that helps to mix oil and water together, best for oil-in-water emulsions. It is also a cleansing agent. When combined with cetearyl alcohol, ceteareth-20 forms a mix that, according to acne.org, can be comedogenic.
All functions


Ceteareth-20 is an ingredient that acts as an emulsifier and a cleansing agent. This type of ingredient features a water-loving tail attached to an oil-loving head group. The split in functionality allows emulsions to form within a mixture of oil and water, and this particular emulsifier is best for forming oil-in-water emulsions.

Ceteareth-20 can also serve as a cleansing agent, which works by the oil-loving head group of the molecule surrounding the dirt and oil on the skin and the water-loving tail allows the encapsulated debris to be rinsed away easily with water. This ingredient is typically supplied as an off-white pellet.

When combined with cetearyl alcohol, ceteareth-20 forms a comedogenic mix (according to acne.org).