2-METHYLTHIO-3,5-METHYLPYRAZINE Chemical Properties

Density 

1.145 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.583(lit.)

FEMA 

3208 | (METHYLTHIO)METHYLPYRAZINE (MIXTURE OF ISOMERS)

Flash point:

193 °F

Odor

at 0.10 % in dipropylene glycol. nutty earthy peanut musty coffee vegetable

Odor Type

nutty

JECFA Number

797

InChIKey

WVLCKAWPCLTOOS-UHFFFAOYSA-N

LogP

0.06

CAS DataBase Reference

67952-65-2(CAS DataBase Reference)

EPA Substance Registry System

Pyrazine, methyl(methylthio)- (67952-65-2)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

2-METHYLTHIO-3,5-METHYLPYRAZINE Usage And Synthesis

Description

2-Methyl-(3 or 5 or 6)-(methylthio)pyrazine (mixture of isomers) is like roasted almonds, hazelnuts. This may be prepared from 2-methylchloropyrazine; a mixture of 2-methyl-3-methylthiopyrazine, 2-methyl-5-methylthiopyrazine, and 2-methyl-6-methylthiopyrazine is obtained.

Chemical Properties

2-Methyl-3(or 5 or 6)-methylthiopyrazine has a roasted almond, hazelnut and vegetable aroma.

Preparation

From 2-methylchloropyrazine; a mixture of 2-methyl-3-methylthiopyrazine, 2-methyl-5-methylthiopyrazine, and 2-methyl-6-methylthiopyrazine is obtained.

Aroma threshold values

Detection: 4 to 60 ppb. Aroma characteristics at 1.0%: toasted popcorn, roasted almond, hazelnut, peanut and cashewnutty, with a caramellic and corn-chip nuance.

Taste threshold values

Taste characteristics at 3 to 10 ppm: nutty, roasted and earthy with coffee and corn nuances, peanut and pecan nutty, popcorn and corn chip–like with a burnt musty nuance.

2-METHYLTHIO-3,5-METHYLPYRAZINE(67952-65-2)Related Product Information

• Pyrazine
• 2-METHYLTHIO-3(5)-METHYLPYRAZINE MIXTURE
• 2-METHYLTHIO-3(5/6)-METHYLPYRAZINE,2-METHYLTHIO-3(5/6)-METHYLPYRAZINE
• 2-Methylthio-5-methylpyrazine
• 2-METHYLTHIO-3,5-METHYLPYRAZINE
• 2-Mercaptopyrazine
• 2-METHYLTHIO-3(5)-METHYLPYRAZINE MIXTURE
• 2,6-Dimethylpyrazine
• 2-(Methylthio)pyrazine