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DISODIUM LAURETH SULFOSUCCINATE.

Valuable CAS 39354-45-5 / 40754-59-4 / 42016-08-0 / 58450-52-5 / 68815-56-5 / CLEANSING, FOAMING, SURFACTANT - CLEANSING, SURFACTANT - FOAM BOOSTING, SURFACTANT - HYDROTROPE

Disodium Laureth Sulfosuccinate is an exceptionally gentle anionic surfactant prized for its effective cleansing capabilities. It meticulously lifts dirt, oil, and impurities without stripping the skin, making it a preferred, milder alternative to harsher sulfates. Its larger molecular size is thought to contribute to its reduced potential for skin penetration and irritation.

Summary

Cleansing Foam Boosting Foaming Surfactant Emulsifying Dispersing Wetting

Science

Mechanism of Action

This ingredient operates as an anionic surfactant by lowering water's surface tension, which enables it to encapsulate and suspend dirt, oils, and other impurities for effortless rinsing. Beyond its primary cleansing role, it functions as an effective foaming agent, emulsifier, dispersant, and wetting agent, facilitating the harmonious blend of diverse cosmetic ingredients and producing a stable, moderate foam. Its molecular structure, characterized by a larger size, is hypothesized to limit its absorption into the skin, contributing to its reputation as a gentler option compared to smaller-molecular-weight sulfates.

Research

Clinical Evidence

High confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Did not induce skin irritation in both healthy subjects and patients with pre-existing dermatitis.
  2. 02 In aqueous solutions, it did not induce skin irritation in healthy subjects or patients with pre-existing dermatitis. However, when formulated in a citrate buffer, it was classified as a mild skin irritant in healthy subjects.
  3. 03 As part of a trade name mixture, it did not induce clinically significant irritation or any evidence of allergic contact dermatitis in normal human subjects.
  4. 04 In a 14-day cumulative irritation test (as part of a trade name mixture), it was predicted to be a mild skin irritant during normal use, indicating concentration-dependent tolerance over prolonged exposure.
  5. 05 In a rabbit study, it received a comedogenic score of 1, indicating an increase in visible hyperkeratosis without actual comedone formation, suggesting a very low comedogenic potential.

Transparency

Dusting Analysis

Not commonly dusted

As a primary functional ingredient, Disodium Laureth Sulfosuccinate is incorporated into formulations for its active surfactant and cleansing properties, rather than in sub-efficacious amounts for label claims.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

This ingredient is most stable within a pH range of 5.0 to 7.0, exhibiting a tendency to hydrolyze in highly alkaline or acidic conditions. While reversible cloudiness and crystallization may occur after storage, these do not negatively impact its quality. It demonstrates stability in hard water and is compatible with other anionic, non-ionic, and amphoteric surfactants. It can be easily integrated into the water phase and processed effectively under both hot and cold manufacturing conditions.

Synergies

  • Anionic surfactants
  • Non-ionic surfactants
  • Amphoteric surfactants

Conflicts

  • Highly acidic media
  • Highly alkaline media

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

The CIR Expert Panel concluded Disodium Laureth Sulfosuccinate is safe for use in cosmetics and personal care products at current practices of use and concentration, provided formulations are non-irritating. It is generally recognized as safe under a concentration of 1%, and products formulated under 10% typically minimize irritation risk. For products intended for prolonged skin contact, the concentration should not exceed 1%. While generally well-tolerated, irritation can occur, particularly with prolonged exposure, in individuals with sensitive skin, or at higher concentrations. It may also cause eye irritation. Trace impurities such as 1,4-dioxane and formaldehyde may be present but can be controlled through purification processes.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Disodium Laureth Sulfosuccinate is a valuable surfactant, offering gentle yet effective cleansing for all skin types with a low risk of irritation and comedogenicity when precisely formulated within recommended concentration ranges.

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