Sodium α-alkenyl sulfonate (CAS Nr.: 68439-57-6) AOS 92% Powder and AOS 35% liquid is an anionic surfactant with high foaming and good hydrolytic stability. It has excellent resistance to hard water, low toxicity, mildness, low irritation and good biodegradability. Especially used in non-phosphorus detergents.

Surface activity

AOS and other anionic surfactants (such as LAS, AS, AES, etc.) also have excellent surface activity. Within a certain concentration range, AOS can reduce the surface tension of water from 72mN.m-1 to 30-40mN.m- 1 or so. The critical micelle concentration (cmc) of several anionic surfactants measured by surface tension method at 25°C is as follows:

The following table Critical micelle concentration (cmc) of several anionic surfactants

Name Sodium Laurate K12 LAS AOS14-16 AOS14-18 AOS16-18

Cmc 5.3 2.3 0.65 0.60 0.40 0.20

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Properties

AOS has good solubility, moisture retention, foaming ability, hard water resistance, calcium soap dispersing power, detergency and biodegradability. Experiments have proved that AOS is safe for human body and environment.

Specification

Appearance                                                 White or Light yellow powder             Light yellow clear liquid

Active matter (%)                                             ≥92                                            35.0±1

Petroleum ether soluble substances (%)             ≤3.0                                           ≤1.5

Inorganic salts (%)                                           ≤5.0                                           ≤1.5

Free alkalinity (%)                                            ≤1.0                                           ≤0.3

Water (%)                                                        ≤3.0                                             -

pH value (1% aq. solution)                                9.5~11.5                                       - 

Whiteness (WG)                                               ≥60                                               -

Color (Hazen, 5% a.m. solution)                              -                                           ≤60   

Application

Mainly be used in mild detergent and products for baby, such as hand lotion, washing powder, complex soap, shampoo, bath lotion, facial cleaning cream, phosphorus free detergent. AOS can also be used as industrial detergents.

Packing

Powder / needle form products: craft-paper bags, 25 Kg net weight.

Liquid form products: plastic barrels, 200 Kg net weight.

Storage
Placed in sealed container and kept in a cool and dry place.
Avoid strong vibration, insolation, high temperature, smoke and fire.