Cleansing and sulfates: SLSA (Sodium Lauryl Sulfoacetate)

Sodium Lauryl Sulfoacetate (SLSA) is a foaming cleansing agent that is often confused with traditional sulfates because of its similar name, but it is a milder, gentler ingredient. Although it creates a rich, creamy lather, it may still feel somewhat drying with regular use on very sensitive skin or scalps. To ensure the gentlest, most nourishing experience possible, we avoid SLSA in favor of even milder cleansing agents such as SCI, which cleanse effectively while preserving the hair and skin’s natural moisture and oils.

SLSA Sodium Lauryl Sulfoacetate

Properties

  • Cleansing
  • Foaming
  • Emollient

Category

  • Surfactants
  • Cleansing ingredients

SLSA at a glance

  • A mild and gentle surfactant derived from coconut and palm oil
  • Creates a rich, stable, luxurious lather in bath and shower products
  • Has a much larger molecular size than SLS and therefore does not irritate the skin
  • Is fully biodegradable and approved for use in organic skincare

SLSA description

SLSA (which is short for Sodium Lauryl Sulfoacetate) is a plant-based, mild cleanser in powder form. Although its name is similar to the notorious substance SLS (Sodium Lauryl Sulfate), SLSA is an entirely different ingredient with completely different properties. The main difference lies in the size of the molecules. SLSA molecules are so large that they cannot penetrate the skin barrier, making the ingredient extremely gentle and non-irritating to both the skin and mucous membranes.
The ingredient is hydrophilic, which means it dissolves easily in water. It works by reducing the surface tension of water, allowing dirt, grease, and oils to be lifted from the skin and easily rinsed away. What makes SLSA so popular is its ability to create a thick, creamy, long-lasting foam that feels luxurious on the skin without drying it out or disrupting the skin’s natural moisture balance.
Because SLSA is so mild and completely sulfate-free, it is widely used in products for sensitive skin, baby products, as well as solid shampoos, bath bombs, and bubble bath. It is an excellent choice for formulations where you want to combine high foaming performance with gentle cleansing that respects the skin barrier.

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