2-Acetyl-3-Ethylpyrazine (CAS 32974-92-8) — Mid Note Fragrance Ingredient
2-Acetyl-3-Ethylpyrazine
CAS 32974-92-8
What Is 2-Acetyl-3-Ethylpyrazine?
2-Acetyl-3-Ethylpyrazine (CAS 32974-92-8) is an aroma chemical used as a fragrance and flavour ingredient. Its odour is described as bakery, sweet and fish, placing it within the gourmand family as a mid note with medium volatility. With a molecular weight of 150.2 (formula C8H10N2O), it is handled by perfumers as a building block for compositions where a bakery character is desired. The data below is compiled from public chemical and regulatory sources.
Safety Profile
HANDLE WITH CARE
What Does 2-Acetyl-3-Ethylpyrazine Smell Like?
The odour profile of 2-Acetyl-3-Ethylpyrazine is reported as bakery, sweet, fish, garlic, spices, cold, sour, burnt, acid, warm, musky, sweaty, ammonia/urinous, decayed, wood, grass, flower, chemical, edible. The dominant facet is its bakery character, with the remaining notes adding nuance and complexity. As a mid note it contributes to the heart of a fragrance. Perceived intensity and exact character depend on concentration, the carrier and the surrounding accord.
Scent Profile
Profile derived from public odour-descriptor data; relative, not absolute.
Chemistry & Properties
The Chemistry
2-Acetyl-3-Ethylpyrazine has the molecular formula C8H10N2O and a molecular weight of 150.2 g/mol. Its canonical SMILES representation is CCC1=C(N=CC=N1)C(C)=O. Its reported log P (XLogP) of 1.24 indicates a moderately polar molecule, which informs how it partitions in a formula. Physical constants below are drawn from PubChem and EPA CompTox public datasets.
Physical & Chemical Properties
| Molecular Weight | 150.2 g/mol |
|---|---|
| Boiling Point | 247.3 °C |
| Melting Point | 68.93 °C |
| Flash Point | 91.53 °C |
| Density | 1.07 g/cm³ |
| Vapor Pressure | 0.06042 mmHg |
| Water Solubility | 0.07111 g/L |
| XLogP | 1.24 |
Perfumer Guide
Alternatives & Comparisons
Ingredients occupying a similar odour space — useful as substitutes or companions when 2-Acetyl-3-Ethylpyrazine is unavailable or restricted.
Shares bakery, sweet, fish character — a candidate substitute or companion in the same odour space.
Shares bakery, sweet, fish character — a candidate substitute or companion in the same odour space.
Shares bakery, sweet, fish character — a candidate substitute or companion in the same odour space.
Safety & Regulatory
⚠ Regulatory Disclaimer
General reference only. IFRA, REACH and EU Cosmetics Regulation standards update periodically. Consult the current IFRA Standards Library before formulating. Not legal or regulatory advice.
IFRA Status
No IFRA restriction recorded in the data set. This is not a guarantee of unrestricted status — always confirm against the current IFRA Standards Library.
GHS Classification
Signal word: Warning
Open 2-Acetyl-3-Ethylpyrazine in Fragrance Studio (Pro) for the calibrated vapour-pressure curve, the modelled odour-threshold estimate, and the substitute-matching engine across 2,900+ aromachemicals.
References & Sources
- PubChem Compound Summary (NIH) — search by InChIKey
- EPA CompTox Chemicals Dashboard — physicochemical & fate data
- IFRA Standards Library (49th / 51st Amendment)
Data: PubChem (NIH), EPA CompTox, IFRA. Last reviewed: Jun 2026.
Related Research
- Triethyltrimethyl-2-cyclohexen-1-one (CAS 68845-35-2) — Woody Base Note Fragrance Ingredient
- 2-Nonanol (CAS 628-99-9) — Green Middle Note Fragrance Ingredient
- 1,3-Benzenediol, 4-(2-phenyldiazenyl)- (CAS 2051-85-6) — Woody Not specified Note Fragrance Ingredient
- Cyclopropanecarboxylic acid, 2-[1-(3,3-dimethylcyclohexyl)ethoxy]-2-methylpropyl ester (CAS 477218-42-1) — Woody Base Note Fragrance Ingredient
![Benzoic acid, 2-[[(4-hydroxy-3-methoxyphenyl)methylene]amino]-, methyl ester (CAS 72927-84-5) — Woody Base Note Fragrance Ingredient](https://thegoodscents.company/wp-content/uploads/2026/04/benzoic-acid-2-1-3-768x439.webp)
