Sodium Methyl Cocoyl Taurate (SMCT) is an amino-acid-derived, anionic surfactant, commonly used as a mild yet effective cleansing and foaming agent. It enables efficient oil-water mixing, thoroughly removing dirt, sebum, and makeup without stripping the skin’s natural oils or disrupting pH balance — leaving a soft, non-drying finish ideal for sensitive or rosacea-prone skin. Its biodegradable nature and gentle surfactant profile make it a superior alternative to harsher sulfates.
In shampoos and scalp treatments, SMCT plays a vital role in sulfate-free formulations, providing rich, creamy lather with excellent resilience even in hard water. It gently cleanses the scalp and hair, improving manageability and moisture retention while minimizing irritation — beneficial for dry, irritated, or color-treated hair.
Quick Insights
Ingredient Rating:
GOOD
Type of Ingredient:
Texture Enhancer, Cleansing Agent and Emulsifier
Intended Function:
To gently cleanse skin and hair, stabilize emulsions, and provide voluminous, soft foam without compromising hydration or barrier integrity.
Common Applications:
Utilized in facial cleansers, body washes, shampoos (including sulfate-free and baby formulations), scalp tonics, toothpaste, and cleansing mousses.
Target Audience:
Brands and formulators developing products for sensitive skin, baby care, rosacea, color-treated hair, or those committed to sulfate-free, cleanser formulations with superior sensory profiles.
Also Known As:
Sodium N‑cocoyl‑N‑methyl taurate, Sodium cocoyl methyl taurate, N‑Methyl‑N‑Coconut Acid Taurate.
Safety Analysis
Regulatory and Safety Profile
The Cosmetic Ingredient Review deems SMCT safe when formulated to be non-irritating, with common usage levels ranging from 1 – 5% in most skin products and up to 10% safely permissible. It typically appears in rinse-off products, though leave-on uses can reach 11 – 13% in certain formulations. It is not sensitizing and shows minimal irritation in realistic cosmetic use scenarios.
Irritation Considerations
High-concentration testing indicates potential ocular irritation (corrosive at ≥20%). However, when used at typical cosmetic concentrations (~1 – 5%) and in rinse-off formats, risk is minimal. Formulations intended for sensitive areas (eyes or mucosa) should be pH-balanced and low in concentration.
Environmental and Skin Compatibility
SMCT is biodegradable, displays hard water resistance, and is stable across wide pH ranges, enhancing formulation robustness and eco-friendliness.
References
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