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SORBETH-30 TETRAISOSTEARATE.

Valuable / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sorbeth-30 Tetraisostearate is a versatile ethoxylated sorbitol derivative that acts as an effective surfactant, emulsifier, and solubilizer in skincare formulations. It facilitates the mixing of immiscible liquids, supporting effective cleansing and enhancing product texture while contributing to moisture retention.

Summary

Emulsifying Surfactant Solubilizer Skin-conditioning

Science

Mechanism of Action

This ingredient primarily functions by reducing the surface tension between oil and water phases, thereby enabling their stable integration within a formula. As a surfactant, it efficiently binds to and lifts oils and dirt, allowing for their easy removal during cleansing. It also acts as an emulsifier, stabilizing oil-in-water systems, and a solubilizer, helping to disperse oil-soluble ingredients in aqueous solutions. Beyond formulation stability, it can enhance the sensory experience of products, imparting a silky feel, and may aid in forming a protective barrier on the skin to support moisture retention.

Research

Clinical Evidence

High confidence
Effective range 0.11–25.6%
Optimal

10%

Key findings

  1. 01 Typical usage concentrations for related ingredients like Sorbeth-30 Tetraoleate in rinse-off products range from 0.11% to 10.8%.
  2. 02 For oil-based cleansers, a recommended concentration for emulsification and solubilization, observed for a related ingredient (Sorbeth-30 Tetraoleate), is between 10% and 15%.
  3. 03 The Cosmetic Ingredient Review (CIR) Expert Panel has reviewed the broader group of Polysorbates, which includes Sorbeth-30 Tetraisostearate, noting maximum usage concentrations of up to 11.9% in leave-on products and up to 25.6% in rinse-off products.

Transparency

Dusting Analysis

Not commonly dusted

Sorbeth-30 Tetraisostearate is a fundamental ingredient crucial for its functional properties as an emulsifier, surfactant, and solubilizer, making it essential for product stability, texture, and cleansing efficacy rather than a claim-based additive.

The Formula

Formulation

Solubility
Both
Optimal pH 4 – 8
0 7 14

Stability

This ingredient exhibits good stability within a pH range of 4.0 to 8.0, but it can undergo hydrolysis under extreme strong acid or strong alkali conditions. Formulations should be designed to ensure the stability of oil-in-water systems without phase separation and maintain consistent viscosity across a broad temperature range, typically from -10°C to +40°C.

Conflicts

  • strong acid conditions
  • strong alkali conditions

Safety

Safety Profile

CIR Status
Safe as used
Max tested
25.6%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that polysorbates, including Sorbeth-30 Tetraisostearate, are safe for use in cosmetics provided they are formulated to be non-irritating. The highest reported concentration for the polysorbate group was 25.6% in rinse-off products. Earlier concerns regarding polyethylene glycols (PEGs) on compromised skin were re-evaluated, and subsequent data confirmed minimal dermal penetration of low-molecular weight PEGs, effectively removing the previous safety caveat.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sorbeth-30 Tetraisostearate is a valuable ingredient for its multifunctional role in enhancing product stability, texture, and cleansing efficacy, with a strong safety profile across all skin types.

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