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PROPYLENE GLYCOL BUTYL ETHER.

Valuable CAS 5131-66-8 / HUMECTANT, SOLVENT, VISCOSITY CONTROLLING

Propylene Glycol Butyl Ether is a versatile cosmetic ingredient recognized for its ability to enhance skin hydration and texture. It effectively conditions the skin by mitigating flaking and restoring suppleness, while also acting as a key solvent and viscosity regulator in formulations.

Summary

Skin conditioning Hair conditioning Humectant Solvent Viscosity controlling

Science

Mechanism of Action

This ingredient functions as both a skin and hair conditioning agent. On the skin, it improves the appearance of dryness or damage by reducing flaking and promoting a feeling of suppleness. Beyond conditioning, it serves as a humectant, attracting and retaining moisture, and also acts as a solvent and viscosity-controlling agent, which contributes to overall product texture and stability.

Research

Clinical Evidence

Medium confidence
Effective range 0.001–0.26%
Optimal

N/A

Key findings

  1. 01 Clinical evaluations involving over 300 subjects across different studies (e.g., 200 subjects for PPG BE800, 112 subjects for PPG-40 Butyl Ether) consistently demonstrated that related PPG Butyl Ethers were non-irritating and non-sensitizing to human skin when formulated appropriately. Animal studies (e.g., a two-year rat study with PPG BE800) also indicated non-carcinogenicity. However, it's noted that animal test data suggested a potential for irritation, underscoring the necessity for careful formulation.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Propylene Glycol Butyl Ether exhibits resistance to hydrolysis in aqueous systems, contributing to its stability in water-based formulations. It has a tendency to absorb atmospheric moisture and is stable for a minimum of 12 months from manufacture, provided proper storage and handling protocols are followed.

Conflicts

  • strong oxidizers
  • rubber articles
  • different plastics
  • heat
  • sparks
  • open flames

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Panel has concluded that Propylene Glycol Butyl Ethers are safe for use in cosmetics, with the critical proviso that products must be formulated to prevent potential irritation. This determination followed a comprehensive review, superseding an earlier 'insufficient data' conclusion. These ingredients comply with the general provisions of the Cosmetics Regulation within the European Union.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Propylene Glycol Butyl Ether is a valuable multi-functional ingredient for enhancing skin condition and formulation aesthetics, provided it is precisely formulated to avoid potential irritation as indicated by safety assessments.

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