Sodium Alpha Olefin Sulfonate (AOS) 35%

Sodium Alpha Olefin Sulfonate (AOS) 35%
Other Names: AOS-35, Sodium C14-16 olefin sulfonate, Alpha-olefinsulfonic acid sodium salt solution

CAS Number: 68439-57-6
Sum Formula: RCH=CH(CH₂)ₙSO₃Na (mixture of chain lengths, typically C14–C16)
Molar Mass: Variable (average approx. 320–350 g/mol)
Appearance: Clear to slightly hazy, pale yellow liquid

Sodium Alpha Olefin Sulfonate (35%) is a high-foaming, anionic surfactant commonly supplied as an aqueous solution. It is valued for its excellent wetting, emulsifying, and cleaning power in alkaline or neutral formulations and is used widely in industrial and technical cleaning applications.

Chemical and Physical Properties

• Active Matter: ~35% (w/w)

• Density: ~1.04–1.06 g/cm³ (at 20°C)

• pH (1% solution): ~7.0–9.0

• Solubility in Water: Fully miscible

• Odor: Mild or slightly fatty

• Foam Profile: High and stable

• Appearance: Clear to slightly hazy liquid

Applications

• Industrial Cleaners: Used in hard surface and multipurpose formulations for its degreasing and foaming properties

• Car Wash & Vehicle Care: High-foaming surfactant for foaming soaps and cleaning agents

• Textile Industry: Wetting agent and detergent for scouring and processing fibers

• Emulsion Polymerization: Functions as emulsifier in latex and polymer dispersions

• Metal Cleaning: Component in alkaline baths for metal degreasing

Safety

Signal Word: Warning

Hazard Statements:

• H315: Causes skin irritation

• H319: Causes serious eye irritation

Precautionary Statements:

P280 Wear protective gloves/protective clothing/use eye/face protection.

P302+P352 IN CASE OF CONTACT WITH SKIN: Wash with plenty of soap and water.

P305+P351+P338 IN EYES: Wash gently with water for several minutes. Remove contact lenses, if present and if easy to do so. Continue to wash eyes.

P332+P313 In case of skin irritation: seek medical advice.

P337+P313 If eye irritation persists: seek medical advice.

First Aid Measures

• Eye Contact: Rinse immediately with water for at least 15 minutes. Seek medical attention if irritation persists

• Skin Contact: Wash thoroughly with soap and water. Remove contaminated clothing

• Inhalation: Move to fresh air. Seek medical attention if symptoms persist

• Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical advice

Handling and Storage

• Storage Conditions: Store in tightly sealed containers in a dry, cool, and well-ventilated area. Protect from freezing and direct sunlight

• Handling Precautions: Avoid contact with skin and eyes. Use with proper ventilation and personal protective equipment