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SODIUM OLETH SULFATE.

Valuable CAS 27233-34-7 / CLEANSING, FOAMING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sodium Oleth Sulfate is an anionic surfactant primarily used for its exceptional cleansing and emulsifying properties. It effectively reduces surface tension to remove impurities and helps blend immiscible components within formulations.

Summary

cleansing emulsifying foaming surfactant

Science

Mechanism of Action

As an anionic surfactant, Sodium Oleth Sulfate reduces the surface tension between oil and water, facilitating the emulsification of oils and the efficient removal of dirt, sebum, and other impurities from the skin. It also generates foam by trapping air in liquid, enhancing the user experience, and acts as an emulsifier to stabilize cosmetic mixtures.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Studies on Sodium Lauryl Sulfate (SLS), a related compound, show moderate irritant effects at concentrations as low as 0.1%. At 0.9-1%, SLS was found to decrease healthy skin thickness and increase water loss permeability, with epidermal concentrations exceeding known irritation thresholds after 24 hours.
  2. 02 In contrast, Sodium Laureth Sulfate (SLES), another related ingredient, demonstrated a significantly milder skin reaction in patch tests across concentrations ranging from 0.125% to 2.0% when compared to SLS.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH ≥5
0 7 14

Stability

For related sulfated ethoxylated alcohols like Sodium Laureth Sulfate, decomposition may occur above 40°C or in acidic environments below pH 5. It generally exhibits continuous stability across pH variations, and in the presence of metal ions or oxidizing agents. Optimal storage involves sealed containers at room temperature, avoiding both overheating and freezing.

Conflicts

  • cationic surfactants

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Sodium Oleth Sulfate is safe for cosmetic use, provided it is formulated to be non-irritating. The panel observed that ingredients within this group, including Sodium Oleth Sulfate, have the potential to induce eye and skin irritation, with the severity directly correlating with concentration. Therefore, careful formulation is paramount to mitigate these risks.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Sodium Oleth Sulfate is a valuable anionic surfactant providing effective cleansing and emulsification, though its use requires precise formulation to ensure non-irritating concentrations, especially given data on related sulfates.

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