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Moumoujus

ISOBUTYL CINNAMATE.

Questionable CAS 122-67-8 / PERFUMING

Isobutyl cinnamate is an oil-soluble ester primarily valued for its distinctive fruity-floral fragrance and its capability to absorb UV radiation. Beyond its aromatic contribution, this ingredient functions as a solvent and emulsifier, which aids in formula stability and the integration of other fat-soluble components. It is classified as a cinnamic acid ester, a group of compounds recognized for potential beneficial activities within skincare.

Summary

Fragrance UV Absorber Emulsifier Solvent

Science

Mechanism of Action

This ingredient functions primarily as a fragrance, contributing a fruity and floral aroma to formulations. It also exhibits UV-absorbing capabilities, making it beneficial in sun protection products. Its oil-soluble nature allows it to serve as an emulsifier or solvent, facilitating the dissolution and dispersion of fat-soluble active ingredients. As a cinnamic acid ester, it is linked to potential antioxidant, anti-inflammatory, antimicrobial, and antimelanogenic properties, which could support the skin's hydrolipid barrier and influence melanin regulation.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Isobutyl cinnamate generally possesses stable chemical properties but is susceptible to hydrolysis and oxidation under certain conditions. Its overall stability and compatibility within various formulations are considered good.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
0.005%
Sensitization risk Moderate

The safety of Isobutyl cinnamate has been evaluated by the Research Institute for Fragrance Materials (RIFM), which published a peer-reviewed assessment indicating a potential for skin sensitization in a small subset of individuals. To prevent this, RIFM has established a maximum acceptable concentration, and the International Fragrance Association (IFRA) provides specific safe use standards. The maximum recommended use level in general cosmetic formulations is 0.5000%. IFRA also sets more stringent restriction limits for certain product categories, such as 0.066% for products applied to the axillae. While a human experience study at an 8% concentration reported no observed irritation or sensitization, the RIFM/IFRA guidelines are crucial for managing its sensitization potential. GHS classification indicates it causes mild skin irritation (Category 3, H316). The U.S. FDA has approved its use in food flavor and fragrance, granting it Generally Recognized as Safe (GRAS) status for food applications within defined limits.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

Isobutyl cinnamate offers functional benefits such as UV absorption and emulsification, but its primary role as a fragrance and identified potential for skin sensitization necessitate careful evaluation for inclusion in precision skincare formulations.

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