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DIMETHYL-3-METHYLPENTADIENYL-OXIRANE.

Avoid CAS 69103-20-4 / PERFUMING

DIMETHYL-3-METHYLPENTADIENYL-OXIRANE is a reactive organic compound distinguished by its oxirane ring structure. While recognized for its antimicrobial properties, its primary applications have historically been in perfumery and personal care products like deodorants.

Antimicrobial Fragrance

Science

The core of this ingredient's activity stems from its highly reactive oxirane ring, which readily undergoes ring-opening reactions upon encountering nucleophiles, including various biological molecules. This inherent chemical reactivity is understood to contribute to its observed antimicrobial efficacy.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Safety

CIR Status
Not reviewed
Sensitization risk High

ECHA GHS classification indicates a significant concern, with 20.2% of reported cases classifying it as a potential skin sensitizer, warning of 'May cause an allergic skin reaction' (H317). While the FDA lists it as an 'ACTIVE' substance within EPA programs, no dedicated FDA cosmetic safety assessment is available for cosmetic use.


Your Skin

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

Our Assessment

Avoid

Due to a documented high risk of allergic skin reactions (20.2% of reports) and a lack of specific cosmetic safety assessments or clinical efficacy data, we recommend avoiding the use of DIMETHYL-3-METHYLPENTADIENYL-OXIRANE in skincare formulations.


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