Description

Sodium Lauryl Sulfate (SLS) – Liquid Form

What is SLS Liquid?

Sodium Lauryl Sulfate (SLS) in liquid form is a high-foaming anionic surfactant commonly used in cleansing and detergent formulations. Derived from coconut or palm kernel oil, it is a clear to slightly yellow, viscous liquid and functions primarily as a cleanser, foaming agent, and emulsifier.

💡 SLS is different from SLES (Sodium Laureth Sulfate), which is milder due to ethoxylation.

Key Benefits:

• Excellent Foaming: Produces rich, dense lather, even in hard water.

• Strong Cleansing Power: Removes oils, dirt, and product buildup effectively.

• Low Cost: Very economical and effective at low concentrations.

• Versatile: Works in a wide range of pH and temperature conditions.

• Easy to Use: Already in liquid form, easier to blend into water-based formulations.

Common Uses:

• Shampoos and hair cleansers

• Body washes and shower gels

• Facial cleansers (non-sensitive formulas)

• Liquid soaps and hand washes

• Household cleaning products

• Car wash soaps and industrial cleaners

Usage Rates:

• Shampoos & Body Washes: 10% – 20% (usually combined with milder surfactants)

• Facial Cleansers: 5% – 10% (only in products not intended for sensitive skin)

• Hand Soaps & Liquid Detergents: 10% – 30%

• Industrial/Household Cleaners: Up to 50% or more, depending on use

✅ Always dilute before use and combine with other surfactants (e.g., Cocamidopropyl Betaine) to reduce potential irritation.

Formulation Tips:

• Works best in a pH range of 5.5 – 8.5.

• Can be thickened with salt (NaCl) or thickening agents like xanthan gum or carbomer.

• To reduce harshness, pair with soothing agents (e.g., aloe vera, panthenol) or mild co-surfactants.

• Do not heat excessively; add during the cool-down phase if formulating from scratch.

Safety & Precautions:

• SLS can be irritating to skin and eyes, especially in high concentrations or in leave-on products.

• Avoid in formulations for babies, very dry/sensitive skin, or intimate areas.

• Use with gloves during handling and formulation.

Storage:

• Store in a cool, dry area, tightly sealed.

• Protect from direct sunlight and freezing.

Summary Table:

Application Usage Rate

Shampoo10% – 20%

Body Wash10% – 20%

Hand Wash10% – 30%

Household Cleaners20% – 50%