AOS alpha olefin sulfonate sodium (alpha olefin sulfonate sodium) product introduction 
Full name: Sodium Alpha Olefin Sulfate, abbreviated as AOS, INCI name: Sodium C14-16 Olefin Sulfate, anionic surfactant 
CAS number: 68439-57-6 
Structural formula: mixture, mainly composed of two components 
>Formula note: LAS, AEO-9, K12, 6501, and AOS are commonly used combinations in washing formulas. AOS's biggest advantages: strong resistance to hard water, delicate and stable foam, less irritating than K12, acid and alkali resistance, suitable for phosphorus free detergent; Foaming and decontamination under hard water conditions are far better than LAS and K12 Tiktok encyclopedia 
1、 Physical and chemical properties 
The two mainstream specifications in industry: 
1. AOS-35 (liquid, most commonly used): 25 ℃, colorless to light yellow transparent viscous liquid, active substance 34-36% 
2. AOS-92 (powder/particle): White to slightly yellow powder, with an active ingredient of ≥ 92%, commonly used in laundry detergent and solid composite soap .. 
-Solubility: Highly soluble in water; Excellent resistance to hard water, strong calcium soap dispersion, and stable foam and decontamination in high hardness water 
-PH (1% aqueous solution): 9.0-11.0, weakly alkaline; Wide stable pH range, suitable for use in both weak acid and weak alkali environments 
-Biodegradation: Biodegradation rate>90%, environmentally friendly surface activity 
-Compatibility: Can be combined with LAS, AEO-9, 6501, betaine and other anionic/non anionic/amphoteric surfactants at will; Good compatibility with enzyme preparations, suitable for adding enzyme detergents to Zanyu Technology Collection .. 
2、 Product Features 
Super strong resistance to hard water: the attenuation of foam and decontamination in hard water environment is very small, which is the core selling point of AOS. The performance of LAS and K12 in hard water decreases significantly 
The foam is delicate and durable, and the foam feels good and easy to rinse; Foam stability is better than K12 
Less skin irritation, milder compared to K12, suitable for personal care products 
Good acid and alkali resistance stability, suitable for a wide pH range of formulations; Suitable for phosphate free formula, with excellent compatibility with zeolite additives and proteases 
Balanced emulsifying, wetting, dispersing, and cleaning abilities 
AOS powder is prone to moisture absorption and agglomeration; Liquid AOS will slowly hydrolyze under long-term strong acidic and high-temperature conditions 
3、 Main application areas 
1. Daily chemical washing (core) 
Phosphate free laundry detergent, laundry detergent, dishwashing detergent; Especially suitable for detergents in hard water areas; Often combined with LAS and AEO-9 to enhance hard water washing performance. 
2. Personal care 
Shampoo, shower gel, hand sanitizer, facial cleansing products; Foam is dense, with irritation lower than K12. It is often mixed with amphoteric surfactant to make a mild cleansing formula. 
3. Textile printing and dyeing 
Fabric refining agent, wool degreaser, wetting agent. 
4. Industrial and other fields 
Oilfield oil displacement additives, mine flotation agent, fire foam agent, concrete air entraining agent, industrial hard surface cleaning agent.