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Moumoujus

BUTYLENE GLYCOL PROPIONATE.

Optional CAS 91171-54-9 / SOLVENT

A versatile glycol ester that functions as a multifunctional skin-conditioning agent, combining the moisture-binding properties of butylene glycol with the smoothing benefits of a propionate ester. This ingredient serves primarily as an elegant solvent and emollient that enhances formula spreadability while improving the delivery of oil-soluble active ingredients.

Summary

solvent skin-conditioning emollient

Science

Mechanism of Action

Functions through its dual glycol-ester structure to provide humectant and emollient benefits simultaneously. The butylene glycol component attracts moisture to the skin surface, while the propionate ester portion creates a smooth, conditioning film that improves skin feel and enhances the solubility and penetration of lipophilic actives in formulations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

As a functional ingredient primarily used for formulation enhancement rather than marketing appeal, dusting is unlikely to be a significant concern with this ingredient

The Formula

Formulation

Solubility
Oil
Optimal pH 4 – 7
0 7 14

Stability

Demonstrates good stability in acidic to neutral pH environments under standard cosmetic storage conditions. May hydrolyze under extreme pH conditions due to its ester structure.

Synergies

  • Vitamin C
  • Vitamin A
  • MMP inhibitors

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong bases

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

Individual components (butylene glycol and propionic acid) are well-established as safe in cosmetics. Listed in EU CosIng database without specific restrictions.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A well-tolerated multifunctional ingredient that enhances formula performance and skin feel, though direct clinical evidence for skin benefits remains limited.

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References

Sources