Surfactants
REACH
Sodium octyl sulfate
CAS Number
142-31-4
EC Number
205-535-5
Abbreviation
SOS
What is Sodium octyl sulfate?
Sodium octyl sulfate (CAS 142-31-4), abbreviated SOS, is an anionic surfactant. Also marketed as Sipex OLS.
Where is Sodium octyl sulfate used?
- Textile and leather processing: wetting and scouring agent that improves dye penetration and removes oils or finishes from fiber surfaces
- Paper manufacturing: dispersant and process aid controlling foam and fiber distribution in pulp processing
- Personal care: emulsification and foam generation in rinse-off products such as shampoos and body washes
- Industrial cleaning and degreasing: surface-active properties for low-foaming or controlled-foam performance
- It functions as an emulsifier, dispersant, and cleaning agent.
Commercial specifications
- Active concentrations suited to direct incorporation or dilution
- Personal care grades meeting purity benchmarks for cosmetic end-use
Other Names (Synonyms)
Sodium (2-Ehtyl Hexyl) OCtyl Suplhate|Sodium octyl sulphate|Sipex ols|Cycloryl OS|Duponol 80|Sodium capryl sulfate|OCTYL SODIUM SULFATE|Sulfuric acid, monooctyl ester, sodium salt|SOS
What are the physical properties of Sodium octyl sulfate?
Melting Point 195 °C (dec.) (lit.)
Density 1.04
Flash Point 93.3°C
Appearance white solid
Color White
Odor Characteristic odour
Form Coarse Powder
Water Solubility soluble
Vapor Pressure 0.31Pa at 20℃
pH 6-8 (10g/l, H2O, 20℃)
Log P 3.269 (est)
How is Sodium octyl sulfate classified and handled safely? Learn More
Danger
GHS02· Flammable GHS05· Corrosive GHS07· Irritant
Hazard Statements
H228 Flammable solid
H315 Causes skin irritation
H318 Causes serious eye damage
H319 Causes serious eye irritation
H335 May cause respiratory irritation
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
Which trade and regulatory codes apply to Sodium octyl sulfate?
HS Code 29209010
WGK (Germany) 2