Sodium Lauryl Ethyl Sulphate (SLES)
Sodium Lauryl Ethyl Sulphate (SLES) is an anionic surfactant widely used in personal care, cosmetic, and household cleaning products due to its excellent foaming, emulsifying, and cleansing properties. It appears as a clear to slightly cloudy, viscous liquid or paste, depending on its concentration. SLES is derived from ethoxylated lauryl alcohol and is milder on the skin compared to Sodium Lauryl Sulfate (SLS), making it suitable for use in shampoos, body washes, facial cleansers, toothpaste, and hand soaps. Its ability to produce rich lather and effectively remove dirt and oils makes it a key ingredient in many formulations.

Specification for Sodium Lauryl Ethyl Sulphate (SLES 28%–70%)

• Appearance: Clear to slightly hazy, colorless to pale yellow viscous liquid.
• Active Matter (%):
• SLES 28%: 27%–29%
• SLES 70%: 68%–72%
• pH (1% aqueous solution): 6.5 – 8.5
• Free Oil (%): ≤ 1.5%
• Sodium Sulfate (%): ≤ 1.5%
• Unsulphated Alcohol (%): ≤ 1.5%
• Color (Hazen, 5% solution): ≤ 50
• Odor: Mild and characteristic, not rancid or unpleasant
• Viscosity (at 25°C): Depends on concentration, typically 300–600 mPa·s for 70%
• Heavy Metals (as Pb): ≤ 10 ppm
• Arsenic (As): ≤ 2 ppm
• Chloride (as NaCl): ≤ 0.5%