2,3-Diethyl-5-methylpyrazine
Synonym(s):hazelnut pyrazine
- CAS NO.：18138-04-0
- Empirical Formula: C9H14N2
- Molecular Weight: 150.22
- MDL number: MFCD00009635
- EINECS: 242-024-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-10 10:27:33
What is 2,3-Diethyl-5-methylpyrazine?
Chemical properties
CLEAR LIGHT YELLOW LIQUID
Chemical properties
2,3-Diethyl-5-methylpyrazine has a nutty, roasted, vegetable aroma.
Occurrence
Reported to be present in coffee, filberts, potato products, Parmesan cheese, chicken, beef, pork, cocoa, peanuts, popcorn, sesame seed and corn tortillas.
The Uses of 2,3-Diethyl-5-methylpyrazine
2,3-Diethyl-5-methylpyrazine is a volatile compound found in food such as almonds and swiss cheese.
What are the applications of Application
2,3-Diethyl-5-methylpyrazine is a potent odorant in coffee
Preparation
By condensation of 3,4-hexanedione with propylene diamine.
Definition
ChEBI: 2,3-Diethyl-5-methylpyrazine is a member of pyrazines.
Aroma threshold values
Detection: 0.09 to 1 ppb
Taste threshold values
Taste characteristics at 2.5 ppm: musty, toasted; nutty, potato, cocoa, earthy and dirty.
General Description
2,3-Diethyl-5-methylpyrazine has been identified as a potent odorant in coffee sample and has been evaluated by gas chromatography-olfactometry of decreasing headspace samples.
Properties of 2,3-Diethyl-5-methylpyrazine
| Boiling point: | 95 °C (20 mmHg) |
| Density | 0.949 g/mL at 25 °C (lit.) |
| FEMA | 3336 | 2,3-DIETHYL-5-METHYLPYRAZINE |
| refractive index | n |
| Flash point: | 176 °F |
| storage temp. | 2-8°C |
| solubility | Chloroform, Methanol |
| form | neat |
| pka | 2?+-.0.10(Predicted) |
| color | Clear Colourless |
| Specific Gravity | 0.950.949 |
| Odor | at 0.10 % in dipropylene glycol. musty nut skin earthy roasted hazelnut toasted potato dusty foliage vegetable |
| Water Solubility | SLIGHTLY SOLUBLE |
| JECFA Number | 777 |
| CAS DataBase Reference | 18138-04-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Pyrazine, 2,3-diethyl-5-methyl-(18138-04-0) |
| EPA Substance Registry System | Pyrazine, 2,3-diethyl-5-methyl- (18138-04-0) |
Safety information for 2,3-Diethyl-5-methylpyrazine
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. |
Computed Descriptors for 2,3-Diethyl-5-methylpyrazine
2,3-Diethyl-5-methylpyrazine manufacturer
Triveni Interchem Private Limited (Group Of Triveni Chemicals)
Gujarat
product: 2 3-diethyl-5-methylpyrazine
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