AOS (Alpha Olefin Sulfonate)
| Formula: | R–CH=CH–(CH₂)n–SO₃Na |
| CAS Number: | 68439-57-6 |
| EC Number (EINECS): | 270-407-8 |
| HS Code: | 34021100 |
| UN Number: | Not classified as hazardous |
| IUPAC Name: | Sodium C14-16 Alpha Olefin Sulfonate |
| Also Known As: | AOS; Sodium Alpha Olefin Sulfonate |
Typical Specifications
| Appearance: | Clear to light yellow liquid or white powder (depending on grade) |
| Odor: | Mild characteristic |
| Melting Point, °C: | Not applicable (liquid grade) |
| Boiling Point, °C: | >100 (aqueous solution) |
| Density, g/cm³ (at 20°C): | 1.05–1.10 (liquid grade) |
| Flash Point, °C: | Not applicable (water-based solution) |
| Refractive Index (20°C): | ~1.38–1.40 (aqueous solution) |
| Solubility: | Completely soluble in water |
| pH (1% solution): | 7.0–9.0 |
| Vapor Pressure (at 20°C): | Negligible |
| Grades Available: | Liquid (35–40%), Powder (90%+) |
| Packaging: | Drums, IBCs, bags, bulk |
Applications / Uses
Primary Applications
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Surfactant in laundry detergents and dishwashing liquids
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Foaming agent in shampoos and personal care formulations
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Industrial cleaning formulations
Secondary Applications
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Textile scouring and wetting agent
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Emulsion polymerization processes
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Oilfield and enhanced oil recovery applications
End Industries Served:
Home & Industrial Cleaning, Personal Care, Textiles, Oil & Gas, Industrial Manufacturing
Safety & Handling Information
Hazard Class (GHS): Irritant
Hazard Statements (H-Codes):
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H315: Causes skin irritation
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H319: Causes serious eye irritation
Precautionary Statements (P-Codes):
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P280: Wear protective gloves/eye protection
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P305 + P351 + P338: IF IN EYES – rinse cautiously with water
Storage Conditions
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Store in a cool, dry, well-ventilated area
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Protect from freezing (liquid grade)
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Keep containers tightly closed
Transport Information
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ADR/RID: Not classified as dangerous goods
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IMDG: Not classified as dangerous goods
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IATA: Not classified as dangerous goods
Regulatory Information
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REACH Status (EU): Registered
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TSCA (USA): Listed
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ISO Certification: Available on request
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Country Standards: Complies with detergent and industrial-grade specifications
Additional Information
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Shelf Life: 1–2 years (sealed, stored properly)
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Country of Origin: [To be filled – e.g., USA, China, India]
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Typical Packaging Sizes: Drums, IBCs, bags, bulk
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Storage Temperature: Ambient (avoid freezing)
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Stability: Stable under recommended storage conditions