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2-ETHYL-3,(5 OR 6)-DIMETHYLPYRAZINE.

Optional CAS 27043-05-6 / PERFUMING

A nitrogen-containing aromatic compound that primarily serves as a fragrance enhancer and olfactory masking agent in skincare formulations. Most commonly encountered as a trace bioactive component within yeast-derived extracts, where it contributes antimicrobial properties and potential tyrosinase inhibition. Its dual solubility profile makes it versatile for both water-based and oil-based formulations.

perfuming masking antimicrobial

Science

Functions primarily through olfactory enhancement and antimicrobial activity, with EC50 values ranging from 13 to 145.8 μg/mL against various skin pathogens. When present in yeast extracts, contributes to antioxidant activity and melanin synthesis reduction through tyrosinase pathway inhibition.


Research

Medium confidence
Effective range 0.0013–0.0146%
Optimal

0.01%

Key findings

  1. 01 MDPI study demonstrated antimicrobial efficacy at 0.0013-0.0146% concentrations
  2. 02 CIR assessment confirmed contribution to hyperpigmentation reduction in yeast extract formulations

Transparency

Not commonly dusted

Primarily used as a trace component in fragrance concentrates and yeast extracts rather than as a standalone active ingredient, making dusting unlikely.


The Formula

Solubility
Both
Optimal pH 7 – 9
0 7 14

Stability

Demonstrates high thermal stability as a Maillard reaction product. Water solubility approximately 1473 mg/L, with complete miscibility in oils and ethanol. Most stable under alkaline conditions.

Synergies

  • Saccharomyces cerevisiae extract
  • Other yeast-derived compounds

Conflicts

  • Strong oxidizing agents
  • Strong acids

Safety

CIR Status
Safe as used
Max tested
0.1%
Pregnancy
Safe
Sensitization risk Low

Generally recognized as safe when used in typical trace amounts (0.01-0.1%). May cause irritation to skin and eyes in undiluted forms, with LD50 of 460 mg/kg in rats.


Your Skin

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

Our Assessment

Optional

A specialized fragrance component with modest antimicrobial benefits, most valuable when present in complex yeast extract formulations.


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