Sodium Lauryl Sarcosinate(NaLS)

CAS NUMBER: –137-16-6

Sodium Lauryl Sarcosinate (NaLS) is a mild surfactant.

🔹 Form

• Appearance: Clear to light yellow liquid (commercial form)

• Odor: Mild, characteristic

• Solubility: Water-soluble

• pH (30% solution): ~7.0–8.5

• Active matter content: Usually 30%

• Type: Anionic surfactant (derived from sarcosine, a natural amino acid, and fatty acids such as coconut oil)

🔹 Key Properties

• Mild cleansing agent compared to harsher sulfates (like SLS or SLES)

• Excellent foaming ability (produces creamy, stable foam)

• Provides good detergency and conditioning feel

• Compatible with anionic, non-ionic, and amphoteric surfactants

• Helps improve wetting and spreadability of formulations

• Reduces irritation when blended with other surfactants

• Biodegradable and considered safer for sensitive skin

🔹 Applications in Personal Care & Cosmetics

✅ Hair Care

• Shampoos (especially sulfate-free)

• Conditioning shampoos (leaves hair soft, manageable)

• Anti-dandruff or medicated shampoos (compatible with actives like zinc pyrithione)

✅ Skin Care & Cleansing

• Facial cleansers

• Body washes and liquid soaps

• Shaving foams and gels (gives dense, stable lather)

✅ Oral Care

• Toothpaste and mouthwash (used as a foaming and dispersing agent)

🔹 Difference vs. Other Surfactants

• Milder than SLS/SLES → less irritating, more conditioning

• More foaming than Glucosides (like Decyl/Lauryl Glucoside), but slightly less mild

• Often used in blends: Glucoside + NaLS = balance of mildness + foam + viscosity