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Sodium C14-16 olefin sulfonate (MF: C14H27NaO3S, MW: 298.417), abbreviated as AOS, is an anionic surfactant produced by sulphonation and neutralisation of α-olefins. It exhibits excellent foaming properties, hard water resistance, and biodegradability, establishing itself as a core ingredient in detergents, personal care products, and related fields. Based on the carbon chain length of the α-olefin feedstock, AOS can be categorised as C14-C16 AOS, C16-C18 AOS, and C12-C14 AOS.
| Item | Specification |
| Density | 1.054 g/cm³ at 20°C |
| Vapour pressure | 0 Pa at 25°C |
| Surface tension | 0.15–0.38 at 25°C |
| Dissociation constant | 1.435 – 1.440 (20°C) |
| Solubility | Highly soluble in water |
| Foaming properties | Strong foaming power with stable, fine-textured foam; minimally affected by temperature or hard water. |
| Weather resistance | Resistant to acids, alkalis, and high temperatures (stable ≤120°C); resistant to oxidation and deterioration. |
| Biodegradability | ≥90% |
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