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: 2024-11-06 18:33:45

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	n20/D 1.498(lit.)
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.