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ISOBUTYL BUTYRATE.

Questionable CAS 539-90-2 / PERFUMING

Isobutyl Butyrate is an organic ester compound primarily utilized in cosmetic formulations for its distinct sweet, fruity aroma. It also possesses secondary functionality as a solvent within product matrices.

Fragrance Ingredient Solvent

Science

This ingredient functions principally as a perfuming agent, contributing a specific sweet and fruity olfactory profile to skincare and cosmetic products. Its solvent properties allow it to aid in the uniform dispersion and dissolution of other components within a formulation.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Isobutyl Butyrate is highly flammable. It exhibits reactivity with acids, particularly strong oxidizing acids, which can liberate heat and potentially lead to vigorous reactions. Interaction with caustic solutions also generates heat. Mixing with alkali metals and hydrides can produce flammable hydrogen gas. While generally considered slightly soluble in water, it can also be immiscible and spread across the water surface.

Conflicts

  • acids (strong oxidizing acids)
  • caustic solutions
  • alkali metals
  • hydrides

Safety

CIR Status
Not reviewed
Sensitization risk Unknown

While the FDA lists Isobutyl Butyrate (FEMA No. 2187, CAS 539-90-2) as Generally Recognized As Safe (GRAS) for specific food flavoring applications, European safety information indicates a potential for irritation to the eyes, respiratory system, and skin. However, in a Blue-Screen assay, it was found to be negative for both cytotoxicity and genotoxicity.


Your Skin

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

Our Assessment

Questionable

Primarily a fragrance and solvent, Isobutyl Butyrate lacks specific skin benefits and carries a European warning for potential skin irritation, alongside an 'unreviewed' CIR status, making it a questionable choice for precision skincare.


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