Description
AOS powder is the common name for Alpha Olefin Sulfonate powder, which is a type of anionic surfactant. It is widely used in various industries due to its excellent properties.Alpha-olefin sulfonate (AOS) powder is a versatile and biodegradable anionic surfactant with a wide range of applications. It is particularly valued for its excellent foaming, cleansing, and emulsifying properties, as well as its mildness on the skin and stability in various conditions.
Chemical properties
| Property | Typical Value / Description |
| Chemical name | Alpha Olefin Sulfonate |
| Appearance | White to off-white free-flowing powder |
| Odor | Mild, characteristic |
| Active matter | 90–95 % (typical for powder grade) |
| Moisture content | ≤ 5 % |
| pH (1% aqueous solution, 25 °C) | 9.0 – 11.0 |
| Solubility in water | Freely soluble |
| Bulk density | 0.45 – 0.65 g/cm³ |
| Melting point | Not sharp (decomposes) |
| Flash point | Not applicable (solid, non-flammable) |
| Ionic nature | Anionic surfactant |
| Particle size | Fine powder (manufacturer-dependent) |
| Stability | Stable under normal storage conditions |
| Storage condition | Cool, dry place, tightly closed |
Uses of AOS powder:
Personal Care Products:
Shampoos and Body Washes: AOS is a popular ingredient in shampoos, body washes, and bubble baths, including sulfate-free formulations. It provides rich, stable foam and is known for being less irritating to the skin than some other surfactants. It effectively cleanses and degreases without stripping the skin or hair of its natural oils.
Facial Cleansers and Hand Soaps: Its mildness and cleansing properties make it a suitable component for gentle facial cleansers, liquid hand soaps, and bar soaps.
Pet Care: It is also used in pet care formulations due to its gentle nature.
Household and Industrial Cleaning:
Detergent Powders and Cakes: AOS is a key active ingredient in laundry detergents, particularly in powders and cakes. It enhances cleaning performance, especially at lower temperatures and in hard water, and is effective at removing oily and powdery dirt.
Liquid Detergents: It is used in liquid detergents for fine fabrics, dishwashing, and general floor cleaning.
Industrial Cleaners: AOS is found in various industrial cleaning and degreasing products.
Other Industrial Applications:
Textile Industry: It is used as a wetting agent to ensure uniform distribution of dyes and chemicals on fabrics and as a detergent to clean fabrics before dyeing.
Construction: In concrete and mortar formulations, AOS acts as an air-entraining agent and plasticizer, improving workability and durability.
Agriculture: It can be used as an emulsifier in agricultural products and pesticides.
Petroleum Industry: AOS is used in enhanced oil recovery processes as a foaming agent and stabilizer.
Emulsion Polymerization: Its emulsifying properties make it useful in emulsion polymerization.
Fire-fighting Foams: It is also used in the creation of fire-fighting foams.
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