Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

CAPRYLYL GLYCOL.

Valuable CAS 1117-86-8 / DEODORANT, HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

A multifunctional 1,2-glycol that bridges the gap between skincare performance and formula integrity. This amphiphilic molecule serves as a dual-action humectant and emollient while significantly boosting the efficacy of preservative systems.

Summary

Humectant Emollient Preservative Booster Solvent

Science

Mechanism of Action

Caprylyl glycol operates through an amphiphilic molecular structure. Its hydrophilic diol moiety attracts and binds moisture to the stratum corneum, while its lipophilic alkyl chain integrates into the lipid matrix between corneocytes to smooth skin texture. Additionally, it provides antimicrobial support by disrupting microbial cell membranes and increasing the solubility of co-preservatives like phenoxyethanol within the aqueous phase.

Research

Clinical Evidence

High confidence
Effective range 0.5–5%
Optimal

1%

Key findings

  1. 01 A 1.0% concentration in an O/W emulsion demonstrated statistically significant increases in skin hydration at 1, 2, and 4 hours post-application (Minasolve, 2018).
  2. 02 A 7.5% concentration in a 1:1 blend with 1,2-hexanediol showed zero Type IV hypersensitivity reactions in a 200-subject HRIPT (Levy et al., 2009).
  3. 03 Minimum inhibitory concentrations (MIC) of 0.5% were found sufficient to suppress S. aureus, E. coli, and P. aeruginosa within 24 hours (Lawan et al., 2009).

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
1%
Red flag below
0.1%

Caprylyl glycol is rarely 'dusted' because it serves a functional role as a preservative booster even at low concentrations (0.5%). However, if a product markets it as a primary hydrating active, concentrations below 1.0% may be insufficient to provide the measurable humectancy seen in clinical trials.

The Formula

Formulation

Solubility
Both
Optimal pH 2 – 12
0 7 14

Stability

Chemically stable and pH-independent. It transitions from a waxy solid to a clear liquid at 30°C; while sensitive to temperature shifts, it remains stable under standard storage conditions.

Synergies

  • Phenoxyethanol (increases antimicrobial partitioning)
  • 1,2-Hexanediol
  • Active penetration enhancement

Conflicts

  • Nonionic surfactants (may trap the molecule in micelles, reducing antimicrobial activity)
  • High concentrations of specific emulsifiers (may compromise emulsion stability)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

The CIR Expert Panel (2012) confirmed its safety. It is a known penetration enhancer, which should be considered when formulating alongside high-potency actives.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptionally versatile ingredient that provides measurable hydration benefits at 1% while simultaneously ensuring the microbial safety and stability of precision formulations.

Related

Similar Ingredients

Finding similar ingredients…