Sodium C14-16 Olefin Sulfonate

Sodium C14-16 Olefin Sulfonate is a strong anionic surfactant/cleansing agent commonly used at functional levels in shampoos and foaming cleansers, where it can significantly strip barrier lipids and increase transepidermal water loss. Clinical and patch-test experience shows a relatively high potential for irritation (stinging, erythema, dryness), especially in eczema-prone or compromised skin, and cumulative exposure in multi-step routines increases risk. Because it is frequently perceived as a “sulfate-free” alternative but can be comparably harsh, I score it as high irritancy for sensitive populations. Safety Notes: In consumer products, Sodium C14-16 Olefin Sulfonate is primarily used in rinse-off cleansing systems; at the low end it appears around 0.5–2% in mild facial cleansers/body washes where it is blended with amphoterics/nonionics to reduce irritation. Mainstream shampoos and facial/body cleansers commonly use ~3–12% (as active), while high-foam clarifying shampoos, deep-clean body washes, and some acne/oily-skin cleansers marketed to consumers can reach ~15–25% total surfactant active from this material. It is rarely used in leave-on products due to irritation potential, so the observed high end is effectively confined to rinse-off formulas.