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BUTYL CINNAMATE.

Optional CAS 538-65-8 / PERFUMING

A cinnamic acid ester that serves dual roles as a fragrance component and antimicrobial agent in skincare formulations. Beyond its primary function as a scent enhancer, this ingredient exhibits notable pathogen-fighting properties and provides mild antioxidant protection through free radical neutralization.

perfuming masking antimicrobial antioxidant

Science

Functions primarily through dual pathways: delivers pleasant fragrance while disrupting microbial cell membranes, particularly targeting ergosterol in fungal walls. As a cinnamic acid derivative, it neutralizes free radicals and offers secondary UV-B absorption, though insufficient as standalone photoprotection.


Research

Medium confidence
Effective range 0.0013–4%
Optimal

0.1%

Key findings

  1. 01 Achieved significant antimicrobial efficacy with MIC of 626.62 µM against C. albicans and S. aureus pathogens
  2. 02 Human patch testing demonstrated zero irritation or sensitization responses in volunteer subjects

Transparency

Not commonly dusted

Primarily used for fragrance purposes with established concentration limits, making dusting unlikely in legitimate formulations


The Formula

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Demonstrates excellent stability in anhydrous systems and oil-in-water emulsions within neutral to mildly acidic pH environments. Vulnerable to hydrolytic breakdown into cinnamic acid and butanol under extreme pH conditions.

Conflicts

  • Strong oxidizing agents
  • Strong bases (alkalis)
  • Strong acids

Safety

CIR Status
Not reviewed
Max tested
0.5%
Sensitization risk Low

Holds GRAS status from FEMA and FDA approval as food additive (21 CFR 172.515). IFRA guidelines recommend maximum 0.1% in finished fragrances based on 20% fragrance blend calculations.


Your Skin

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

Our Assessment

Optional

A well-tolerated fragrance ingredient with bonus antimicrobial properties, suitable for most skin types except sensitive skin.


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