What is Sodium Alpha-olefin Sulfonate CAS 68439-57-6?

Sodium Alpha-olefin Sulfonate CAS 68439-57-6, also called AOS or sodium C14-16 olefin sulfonate, is an anionic surfactant made by sulfonation and neutralization of alpha-olefins. The 68439-57-6 grade normally refers to a C14-16 mixture supplied as 92% powder or about 35% liquid, valued for rich foam, fast cleaning, and good rinsability.

What is the difference between AOS 92% powder and AOS 35% liquid?

AOS 92% powder is a white to light yellow powder with active matter of at least 92%, making it efficient to ship and convenient for dry-mix detergent formulations. AOS 35% liquid is a pale clear liquid with about 34.0-36.0% active matter, suited to liquid cleaners and systems that need easier handling and dilution.

How does AOS compare with LAS in hard-water cleaning systems?

AOS typically retains foaming and cleaning performance better than many LAS products in hard water, because it is more tolerant of calcium and magnesium ions. It is therefore preferred in vehicle cleaning, pressure washing, and industrial degreasing where hard water, high-foam requirements, or wide pH conditions are present.

What are the main industrial applications of Sodium Alpha-olefin Sulfonate?

This surfactant is used as a primary anionic surfactant in household detergents, laundry products, industrial cleaners, vehicle-wash systems, pressure washing, and hard-surface degreasing. It also appears in some handwash and personal-care formulations where stable foam and good rinsing are required.

What specifications are commonly checked for AOS powder?

For AOS 92% powder, buyers commonly check appearance, active matter at least 92.0%, sodium sulfate content, unsulfonated matter, free alkali, pH, and water solubility. Batch limits vary by plant, so the supplier COA remains the controlling specification for each shipment.

Sodium Alpha-olefin Sulfonate CAS 68439-57-6

Sodium Alpha-olefin Sulfonate, identified by CAS 68439-57-6, is a high-performance anionic surfactant consisting primarily of sodium C14-16 olefin sulfonates. As a versatile sodium alpha-olefin sulfonate, this technical-grade alpha olefin sulfonate sodium salt functions as a primary foaming and emulsifying agent in various industrial detergent formulation processes. This sodium linear alpha-olefin sulfonate is valued for its hard water stability and rapid flash foam generation during heavy-duty cleaning cycles. For laundry and dishwashing formulations, Sodium Methyl Ester Sulfonate (MES) is a related anionic detergent active to compare against the agreed formulation requirements. Our facility provides competitive factory pricing and customized specifications for this material to ensure compatibility with specific manufacturing requirements. For procurement and technical validation, we offer comprehensive MSDS, TDS, COA documentation and support consistent bulk supply for large-scale operations.

CAS: 68439-57-6
Synonyms: Sodium C14-16 Olefin Sulfonate, Sodium Tetradecenesulfonate, AOS, Sodium Alpha Olefin Sulphonate
Einecs: 270-407-8
Grade: Industrial Grade
Package: 25 kg bag (powder) / 200 kg drum / 1000 kg IBC (liquid), customizable

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Product Description

AOS is produced by sulfonation and neutralization of alpha-olefins, resulting in a high-performance anionic surfactant system (typically C14-16). It delivers rich foam, fast soil removal, good rinsability, and stable performance across a wide temperature range, making it suitable for household detergents, industrial cleaners, and some personal-care/handwash type formulations where robust cleansing and foam are needed.

1 Physicochemical Properties (Typical)

1.1 Option A — AOS 92% Powder (Typical)

1.2 Option B — AOS 35% Liquid (Typical)

2 Applications

3 Storage Conditions

4 Safety Precautions

Physicochemical Properties (Typical)

Typical values for common market grades. Final specs follow COA by batch.

Option A — AOS 92% Powder (Typical)

Item	Typical Specification
Appearance (25°C)	White / off-white to light yellow powder
Active matter (%)	≥ 92.0
Sodium sulfate (%)	≤ 3.0 (often controlled; may vary by plant/spec)
Unsulfonated matter (%)	controlled (typ. low; spec varies)
Free alkali (as NaOH, %)	≤ 0.9 (typical)
pH (1% aq. solution)	typically alkaline range (spec varies by plant)
Solubility	Soluble in water (formulation-dependent)

Option B — AOS 35% Liquid (Typical)

Item	Typical Specification
Appearance (25°C)	Colorless to pale yellow clear liquid
Active matter (%)	34.0–36.0
pH (10% solution)	~7.0–8.5 (typical market range)
Solubility	Completely miscible with water

Applications

Laundry detergents (powder & liquid): primary/secondary anionic surfactant
Dishwashing liquids: foam and grease removal
All-purpose & industrial cleaners: wetting, emulsification, soil suspension
Car wash / degreasers: rich foam and rinsability
Oilfield / specialty cleaning where robust foaming/wetting is required (formulation test recommended)

For related anionic surfactant options in detergent formulations, see Sodium Laureth Sulfate (SLES) and LABSA 96%.

Storage Conditions

Store in cool, dry, well-ventilated warehouse, tightly sealed.
Keep away from strong oxidizers; avoid moisture ingress (powder is hygroscopic).
Recommended storage temperature: 5–35°C.
Stack and transport to prevent bag/drum damage; keep pallets clean and dry.
Typical shelf life: 12–24 months (subject to packaging and storage conditions).

Safety Precautions

Avoid contact with eyes and prolonged skin contact; wear gloves + goggles.
If dust may form (powder), use dust mask/respiratory protection and local ventilation.
Wash hands after handling; keep out of reach of children.
Spills are slippery—contain and clean promptly; prevent large releases to drains/waterways.
Typical SDS classifications for AOS products include skin/eye irritation warnings (follow the SDS for your supplied grade).

FAQ - Technical & Supply Chain

Q:
What is Sodium Alpha-olefin Sulfonate CAS 68439-57-6?

A: Sodium Alpha-olefin Sulfonate CAS 68439-57-6, also called AOS or sodium C14-16 olefin sulfonate, is an anionic surfactant made by sulfonation and neutralization of alpha-olefins. The 68439-57-6 grade normally refers to a C14-16 mixture supplied as 92% powder or about 35% liquid, valued for rich foam, fast cleaning, and good rinsability.
Q:
What is the difference between AOS 92% powder and AOS 35% liquid?

A: AOS 92% powder is a white to light yellow powder with active matter of at least 92%, making it efficient to ship and convenient for dry-mix detergent formulations. AOS 35% liquid is a pale clear liquid with about 34.0-36.0% active matter, suited to liquid cleaners and systems that need easier handling and dilution.
Q:
How does AOS compare with LAS in hard-water cleaning systems?

A: AOS typically retains foaming and cleaning performance better than many LAS products in hard water, because it is more tolerant of calcium and magnesium ions. It is therefore preferred in vehicle cleaning, pressure washing, and industrial degreasing where hard water, high-foam requirements, or wide pH conditions are present.
Q:
What are the main industrial applications of Sodium Alpha-olefin Sulfonate?

A: This surfactant is used as a primary anionic surfactant in household detergents, laundry products, industrial cleaners, vehicle-wash systems, pressure washing, and hard-surface degreasing. It also appears in some handwash and personal-care formulations where stable foam and good rinsing are required.
Q:
What specifications are commonly checked for AOS powder?

A: For AOS 92% powder, buyers commonly check appearance, active matter at least 92.0%, sodium sulfate content, unsulfonated matter, free alkali, pH, and water solubility. Batch limits vary by plant, so the supplier COA remains the controlling specification for each shipment.

Ordering & Documentation

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Storage & Shipping

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