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BUTYL BUTYROLACTATE.

Optional CAS 7492-70-8 / PERFUMING

A multifunctional diester compound that serves as both a fragrance component and mild emollient in cosmetic formulations. This lactic acid derivative provides creamy, dairy-like aromatic notes while functioning as a solvent that enhances the spreadability of skincare products.

Fragrance component Solvent Mild emollient Texture enhancer

Science

Acts as a solvent system that dissolves fragrance components and improves product texture, while providing mild emollient properties through its diester structure. As a lactic acid derivative, it may offer subtle skin-softening benefits without functioning as an active exfoliant.


Research

Medium confidence
Effective range 2–5%
Optimal

4%

Key findings

  1. 01 Demonstrated complete absence of skin irritation in 48-hour closed-patch testing
  2. 02 Zero sensitization reactions observed in human maximization protocol

Transparency

Not commonly dusted

Primarily used as a fragrance and solvent component rather than an active ingredient, making dusting practices uncommon in this application category.


The Formula

Solubility
Oil
Optimal pH 3.5 – 6.5
0 7 14

Stability

Maintains stability as a liquid but undergoes hydrolysis in extreme pH environments, breaking down into lactic acid, butyric acid, and butanol components. Requires protection from light and heat exposure.

Synergies

  • Other fragrance components
  • Oil-soluble actives
  • Emollient systems

Conflicts

  • Strong bases
  • Strong alkalis
  • Strong oxidizing agents

Safety

CIR Status
Not individually reviewed, falls under lactic acid esters category
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

CIR Expert Panel considers lactic acid esters safe at ≤10% concentration in leave-on products at pH ≥3.5. RIFM 2023 confirms no sensitization concerns at current usage levels.


Your Skin

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

Our Assessment

Optional

A safe, well-tolerated multifunctional ingredient that enhances fragrance delivery and product texture, though not essential for core skincare benefits.


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