Chemical of China

Sodium Alpha-Olefin Sulfonate (AOS)

Other names: Alpha Olefin Sulfonate; Sodium Linear Alpha Olefin Sulfonate; AOS

CAS number: 68439-57-6

Molecular formula: R-CH=CH-(CH2)n-SO3Na, R=C14~16

Sodium alpha olefin sulfonate has the following features:

  • 100% biodegradability
  • Good wetting, foaming, detergency, emulsifying property
  • Little skin irritant
  • Good calcium soap dispersion and anti-hard water performances
  • Dissolves in water and rinsed easily
  • Good Stability, good compatibility with other kinds of surfactants


Item Standard
Standard GB/T 20200-2006
Appearance Light yellow powder Light yellow liquid
Active matter (%) ≥92 35.0±1
Petroleum ether soluble substances (%) ≤3.0 ≤1.5
Inorganic salts (%) ≤5.5 ≤1.5
Free alkalinity (%) ≤1.0 ≤0.3
Water (%) ≤3.0 -
pH value (1% aq. solution) 9~12 -
Whiteness (WG) ≥80 -
Color (Hazen, 5% a.m. solution) - ≤60

In 25 kg net craft-paper bags (powder).
In 200 kg net plastic barrels (liquid).

Alpha olefin sulfonate mainly be used in mild detergent and products for baby, such as hand lotion, washing powder, complex soap, shampoo, bath lotion, facial cleaning cream, phosphorus free detergent. AOS can also be used as industrial detergents.

Powder and needle form products: store in a cool, dry place. Avoid moisture and heat.
Liquid products: avoid press.

MSDS: Available when required.

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