Sodium Lauryl Sulphate

Sodium Lauryl Sulphate: a caustic detergent useful for removing grease; although commonly included in personal care items (soaps, shampoos and toothpastes etc.) it can irritate skin and should not be swallowed. SLS is an inexpensive and very effective foaming agent. At CollectiveScents.com we promote products that are Free of SLS.

Source: Wikipedia