2-Methylpyrazine
  • 2-Methylpyrazine2-Methylpyrazine

2-Methylpyrazine

2-Methylpyrazine's cas code is 109-08-0.

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Product Description

2-Methylpyrazine Basic information


Product Name:

2-Methylpyrazine

Synonyms:

2-Methylpyrazine ,98%;3-Methylpyrazine;2-Methylpyrazine >=99.0%;2-Methylpyrazine, 99+ % 25GR;2-METHYLPYRAZINE FOR SYNTHESIS;2-Methylpyrazine, 97+%;METHYLPYRAZINE;METHYLPYRAZINE, 2-

CAS:

109-08-0

MF:

C5H6N2

MW:

94.11

EINECS:

203-645-8

Mol File:

109-08-0.mol



2-Methylpyrazine Chemical Properties


Melting point 

−29 °C(lit.)

Boiling point 

135 °C761 mm Hg(lit.)

density 

1.03 g/mL at 25 °C(lit.)

FEMA 

3309 | 2-METHYLPYRAZINE

refractive index 

n20/D 1.504(lit.)

Fp 

122 °F

storage temp. 

Flammables area

pka

1.45(at 27℃)

form 

Liquid

color 

Clear colorless to slightly yellow

Water Solubility 

Fully miscible in water.

JECFA Number

761

BRN 

105778

InChIKey

CAWHJQAVHZEVTJ-UHFFFAOYSA-N

CAS DataBase Reference

109-08-0(CAS DataBase Reference)

NIST Chemistry Reference

Pyrazine, methyl-(109-08-0)

EPA Substance Registry System

Pyrazine, methyl- (109-08-0)


2-Methylpyrazine Safety Information


Hazard Codes 

Xn,Xi,F

Risk Statements 

10-22-36/37/38

Safety Statements 

26-36-16

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

RTECS 

UQ3675000

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29339990


2-Methylpyrazine Usage And Synthesis


Chemical Properties

2-Methylpyrazine has a nutty, cocoa, green, roasted, chocolate, meaty odor.

Chemical Properties

clear colorless to slightly yellow liquid

Preparation

From corresponding carboxylic acid; by catalytic dehydrogenation of 2-methyl-piperazine; by condensation of methylglyoxal with ethylenediamine

Aroma threshold values

Detection: 60 ppb to 100 ppm

Taste threshold values

Taste characteristics at 75 ppm: nutty, brown, musty, roasted and astringent

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Mutation data reported. Flammable liquid when exposed to heat, sparks, or flame. Can react with oxidizing materials. To fight fire, use water spray, foam, dry chemical, CO2. When heated to decomposition it emits highly toxic fumes of NOx.

Purification Methods

Purify it via the picrate and distil the free base. The picrate has m133-134o(from EtOH). [Wiggins & Wise J Chem Soc 4780 1956, Beilstein 23 III/IV 911, 23/5 V 386.]


2-Methylpyrazine Preparation Products And Raw materials


Raw materials

Ethylenediamine-->Methylglyoxal-->2-Methylpiperazine

Preparation Products

Tetramethylpyrazine-->5-Methyl-2-pyrazinecarboxylic acid

 

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