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3,4-DIMETHYLCYCLOPENTANE-1,2-DIONE.

Optional CAS 13494-06-9 / PERFUMING

A cyclic diketone compound that serves as a specialized fragrance and masking agent in cosmetic formulations. This ingredient provides sweet, caramel-like scent notes while effectively neutralizing undesirable odors in skincare products at concentrations below 1%.

perfuming masking

Science

Functions through olfactory masking by providing gourmand fragrance notes that cover base odors in formulations. As a diketone structure, it may interact with olfactory receptors to create pleasant sensory experiences and potentially interfere with insect detection mechanisms.


Research

Medium confidence
Effective range 0.1–1%
Optimal

0.5%

Key findings

  1. 01 FEMA 3268 fragrance standards demonstrate effective odor masking at 0.1-1% concentrations
  2. 02 US Patent research explores arthropod repellent properties through olfactory neuron interaction

Transparency

Not commonly dusted

Primarily used as functional fragrance component rather than active skincare ingredient, making dusting concerns minimal


The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Requires careful handling as reactive diketone; maintains stability under standard storage conditions but sensitive to heat and strong bases

Conflicts

  • Strong oxidizing agents
  • Strong bases
  • Primary amines

Safety

CIR Status
Not reviewed
Max tested
2.5%
Sensitization risk Unknown

IFRA-approved for fragrance use and FEMA GRAS-listed for food flavoring, though lacks specific CIR assessment for topical applications


Your Skin

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

Our Assessment

Optional

Specialized fragrance ingredient useful for sensory enhancement but offers no direct skin benefits.


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