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Ingredient directory

Butyloctyl Salicylate

A multifunctional oil-soluble ingredient that serves triple duty as a gentle emollient, powerful UV filter stabilizer, and SPF enhancement agent. This polar solvent excels at preventing photodegradation of sunscreen actives like avobenzone while improving the dispersion of mineral UV filters. Its unique chemistry allows it to boost sun protection performance without being classified as an active sunscreen ingredient.

Directory entry · Individual source review pending

This profile is awaiting an individual source review. Treat its ratings, dose estimates and compatibility labels as provisional; they are not medical advice or proof of a finished product’s effects.

solvent emollient spf booster uv filter stabilizer

Science

Functions as a highly polar solvent that optimizes energy transfer between UV filters, preventing their breakdown under sun exposure through photostabilization. Simultaneously improves the wetting and dispersion of inorganic UV blockers like zinc oxide and titanium dioxide, while providing mild chemical UV absorption similar to octisalate.


Research

High confidence
Effective range 0.5–35.9%
Optimal

5%

Key findings

  1. 01 Achieves optimal UV filter solvency and significantly increases measured SPF performance in vivo
  2. 02 Effective range for conditioning benefits and enhanced penetration of vitamin A compounds

Transparency

Not commonly dusted

Not typically used in trace amounts; requires meaningful concentrations (0.5%+) to provide functional benefits


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Exceptionally stable with freeze point below -25°C, maintaining ingredient solubility in cold conditions. Water and glycerin insoluble.

Synergies

  • avobenzone
  • zinc oxide
  • titanium dioxide
  • vitamin a

Conflicts

  • strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
35.9%
Sensitization risk Low

CIR Expert Panel approval contingent on non-irritating and non-sensitizing formulation practices


Your Skin

Yes Normal
Yes Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A sophisticated multitasker that elevates sun protection formulations through UV filter stabilization and SPF enhancement while providing gentle conditioning benefits.


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