Sodium laureth sulfate is also called sodium lauryl ether sulfate, (SLES). It’s an inexpensive foaming agent derived from ethoxylated lauryl alcohol. It’s found in many cosmetic and personal care products including: soaps, shampoos, toothpastes, shaving creams, mouthwashes, bubble bath, detergents, body wash, dish soap, mascara, lotions, sun cream, carpet cleaner, stain removers, etc.. This compound exhibits very similar characteristics as sodium lauryl sulfate, (SLS). One difference between the two is SLES is higher foaming but somewhat weaker than SLS. There is much controversy regarding the safety of this compound.
Some have suggested that both SLS and SLES are carcinogenic, but there is no hard evidence. Ethoxylation is a process that uses ethylene oxide, a known carcinogen, to manufacture SLES. During the manufacturing process, ethoxylated surfactants may become contaminated with 1,4- dioxane, a by-product. Laboratory studies show that animals exposed to dioxane for long periods of time can develop cancer, which can be likewise in humans. The Consumer Product Safety Commission agrees that even a trace of this contaminate in skin or personal care products is cause for concern. This chemical can penetrate the layers of the skin or scalp. Exposure to large amounts of dioxane can cause kidney and liver damage. The Consumer Product Safety Commission continues to monitor its use in consumer products.
SLES can be irritating for skin and eyes. Although it’s less irritating than SLS, it’s effects are longer lasting. The American College of Toxicology states: 0.5% SLS concentrations can cause skin irritation and 10% – 30% can cause skin corrosion or severe irritation. Skin becomes dry and irritated. Rashes, infections, inflammation and contact dermatitis can be a common reaction. Environmental contaminants can invade the lower surfaces of skin, more easily. Those with sensitive skin, especially, should take caution using products with high amounts of SLS or SLES. » Read more: Sodium Laureth Sulfate – Skin, Hair and Scalp
