2-Methyl-3-(methylthio)pyrazine

Synonym(s):Popcorn thiopyrazine

CAS NO.：2882-20-4
Empirical Formula: C6H8N2S
Molecular Weight: 140.21
MDL number: MFCD00014610
EINECS: 220-736-8
SAFETY DATA SHEET (SDS)
Update Date: 2024-11-20 15:18:15

2-Methyl-3-(methylthio)pyrazine Structural

What is 2-Methyl-3-(methylthio)pyrazine?

Chemical properties

clear colorless liquid

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.

Definition

ChEBI: 2-Methyl-(3 or 5 or 6)-(methylthio)pyrazine (mixture of isomers) is an aryl sulfide.

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.

Properties of 2-Methyl-3-(methylthio)pyrazine

Boiling point:	213-214 °C (lit.)
Density	1.15 g/mL at 25 °C (lit.)
refractive index	n20/D 1.585(lit.)
FEMA	3208 \| (METHYLTHIO)METHYLPYRAZINE (MIXTURE OF ISOMERS)
Flash point:	210 °F
storage temp.	Sealed in dry,Room Temperature
form	clear liquid
pka	0.88±0.10(Predicted)
color	Colorless to Almost colorless
Odor	at 0.10 % in propylene glycol. roasted meat nutty almond vegetable
JECFA Number	797
CAS DataBase Reference	2882-20-4(CAS DataBase Reference)
NIST Chemistry Reference	Pyrazine, 2-methyl-3-(methylthio)-(2882-20-4)
EPA Substance Registry System	Pyrazine, 2-methyl-3-(methylthio)- (2882-20-4)

Safety information for 2-Methyl-3-(methylthio)pyrazine

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.