Sodium laureth sulfate

Also sodium lauryl sulfate, sodium laurel sulfate, and sodium dodecyl sulfate; also see 1,4-dioxane.

Skin irritant. Reported as toxic in many studies. Has tendency to react with other ingredients to form carcinogenic nitrosamines. The FDA has stated that levels of dioxin formation in products containing sodium laureth sulfate are unacceptable. Studies have shown eye and systemic tissue (heart, liver, brain) penetration. Main ingredient in many shampoos, baby shampoos, and toothpastes.