2-ISOBUTYL-3-METHYLPYRAZINE Chemical Properties

Melting point:

74 °C

Boiling point:

199 °C(lit.)

Density 

0.942 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.492(lit.)

FEMA 

3133 | 2-ISOBUTYL-3-METHYLPYRAZINE

Flash point:

180 °F

storage temp. 

Sealed in dry,Room Temperature

form 

clear liquid

pka

1.88±0.10(Predicted)

color 

Colorless to Orange to Green

Odor

at 0.10 % in dipropylene glycol. herbal green sugar syrup

Odor Type

caramellic

JECFA Number

773

LogP

1.96

CAS DataBase Reference

13925-06-9(CAS DataBase Reference)

EPA Substance Registry System

Pyrazine, 2-methyl-3-(2-methylpropyl)- (13925-06-9)

Safety Information

Safety Statements 

24/25

WGK Germany 

3

HS Code 

29349990

MSDS

• Language:English Provider:SigmaAldrich

2-ISOBUTYL-3-METHYLPYRAZINE Usage And Synthesis

Description

Synthesis: By condensation of ethylenediamine with 5-methyl- 2,3-hexanedione.

Chemical Properties

2-Isobutyl-3-methylpyrazine has extremely powerful herbaceous green earthy notes. Diluted water solutions exhibit a characteristic odor of green bell peppers

Chemical Properties

Liquid

Occurrence

Reported present in coffee, potato products, cooked beef, fried cured pork and roasted peanuts.

Definition

ChEBI: 2-Methyl-3-(2-methylpropyl)pyrazine is a member of pyrazines.

Preparation

By condensation of ethylenediamine with 5-methyl-2,3-hexandione

Aroma threshold values

Detection: 13 to 35 ppb

Taste threshold values

Taste characteristics at 35 ppm: herbaceous, green, earthy notes.

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