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ISOPROPYL BENZOATE.

Valuable CAS 939-48-0 / FRAGRANCE, PRESERVATIVE

Isopropyl Benzoate is an ester widely employed in precision skincare formulations primarily for its antimicrobial efficacy. It functions as a robust broad-spectrum preservative, crucial for maintaining product integrity and preventing microbial contamination.

Preservative Fragrance Ingredient

Science

This ingredient operates by exhibiting a hydrophobic effect, allowing it to bind effectively to the surface of bacterial and fungal cells and their membranes. This interaction disrupts cellular function, leading to microbial cell death and thereby inhibiting the growth of various pathogens within cosmetic products.


Research

High confidence
Effective range ≤0.5%
Optimal

0.5%


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

The ingredient demonstrates stability when stored under recommended conditions, ensuring consistent performance in formulations.

Conflicts

  • strong acids
  • strong alkalis
  • strong oxidising agents
  • strong reducing agents

Safety

CIR Status
Safe as used
Max tested
0.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed Isopropyl Benzoate as safe for use in cosmetic products. The European Union permits its use as a preservative in both leave-on and wash-off cosmetics, with a maximum concentration of 0.5%. While the FDA no longer authorizes its use as a synthetic flavoring substance, it remains regulated under FDA PART 172.515 for synthetic flavoring substances and adjuvants, and the JECFA found no safety concerns as a flavoring agent at current intake levels.


Your Skin

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

Our Assessment

Valuable

Isopropyl Benzoate is a valuable preservative, ensuring product stability and safety against microbial growth, confirmed as safe for cosmetic use within its 0.5% concentration limit.


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