CAS No.5910-89-4,2,3-Dimethylpyrazine Suppliers

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Basic Information

Molecular Structure:
CAS No.:	5910-89-4
Name:	2,3-Dimethylpyrazine
Article Data:	25

Formula:	C₆H₈N₂
Molecular Weight:	108.143
Synonyms:	Pyrazine, 2,3-dimethyl-;2,3-Dimethyl-1,4-diazine;FEMA No. 3271;2,3-Di Methyl Pyrazine;
EINECS:	227-630-0
Density:	0.997 g/cm³
Melting Point:	11-13 °C
Boiling Point:	158.1 °C at 760 mmHg
Flash Point:	54.4 °C
Appearance:	clear yellow to orange liquid
Hazard Symbols:	Xn, F, Xi
Risk Codes:	10-22-37/38-41
Safety:	16-26-39
Transport Information:	UN 1993 3/PG 3
PSA:	25.78000
LogP:	1.09340

Synthetic route

: 107-15-3
ethylenediamine

: 431-03-8
dimethylglyoxal

: 5910-89-4
2,3-dimethylpyrazine

Conditions

Conditions	Yield
With γ-maghemite-silica nanocomposite In neat (no solvent) at 55℃; for 6h; Green chemistry;	94%
With diethyl ether at 0℃; Erwaermen des Reaktionsprodukts und Oxydation des erhaltenen 2.3-Dimethyl-5.6-dihydro-pyrazins mit Fehlingscher Loesung;

: 41110-52-5
5,6-dimethyl-2,3-pyrazinedicarboxylic acid

: 64-19-7
acetic acid

: 5910-89-4
2,3-dimethylpyrazine

Conditions

Conditions	Yield
at 180℃;

: 57193-34-7, 57193-35-8, 84468-52-0
2,3-dimethyl-piperazine

: 5910-89-4
2,3-dimethylpyrazine

Conditions

Conditions	Yield
With aluminum oxide; copper oxide-chromium oxide silicon dioxide aluminium oxide catalyst; water; silica gel at 350 - 400℃;

: 41110-52-5
5,6-dimethyl-2,3-pyrazinedicarboxylic acid

: 5910-89-4
2,3-dimethylpyrazine

Conditions

Conditions	Yield
In acetic acid at 200℃; for 1h; Yield given;

: 72725-81-6
2-<2-Hydroxy-2-(p-methoxyphenyl)ethyl>-3-methylpyrazine

A: 5910-89-4
2,3-dimethylpyrazine

B: 123-11-5
4-methoxy-benzaldehyde

Conditions

Conditions	Yield
In diethylene glycol dimethyl ether at 170℃; Rate constant;

: 54-17-1, 492-61-5, 492-62-6, 492-66-0, 530-25-6, 530-26-7, 530-27-8, 530-28-9, 552-76-1, 579-36-2, 643-69-6, 655-45-8, 2280-44-6, 3646-73-9, 7282-78-2, 7282-79-3, 7282-80-6, 7282-81-7, 7282-82-8, 7283-02-5, 7283-08-1, 7283-09-2, 7283-10-5, 7283-11-6, 7296-15-3, 7296-64-2, 7322-31-8, 10257-28-0, 12772-65-5, 12773-29-4, 12773-31-8, 12773-32-9, 12773-33-0, 12773-34-1, 19982-85-5, 28538-24-1, 32445-46-8, 32445-47-9, 32445-51-5, 32445-52-6, 34685-56-8, 34685-57-9, 35810-56-1, 39281-65-7, 39281-66-8, 39281-67-9, 39281-68-0, 39281-69-1, 39392-61-5, 39392-62-6, 39392-63-7, 39392-65-9, 39392-66-0, 39392-69-3, 40825-84-1, 40825-86-3, 40825-87-4, 40825-89-6, 42752-07-8, 42789-83-3, 46032-76-2, 54808-89-8, 66069-07-6, 120442-57-1, 120442-58-2, 120442-59-3, 120442-67-3, 131064-91-0, 131064-92-1, 131065-00-4, 131065-01-5, 131348-38-4
D-(+)-Glucose

A: 290-37-9
1,4-pyrazine

B: 109-08-0
2-Methylpyrazine

C: 123-32-0
2,5-dimethyl-pyrazine

D: 5910-89-4
2,3-dimethylpyrazine

E: 108-50-9
2,6-dimethylpyrazine

F: 14667-55-1
2,3,5-trimethylpyrazine

Conditions

Conditions	Yield
With ammonium hydroxide In glycerol for 9h; Product distribution; Heating; also with amino acids;

...Expand

5.6-dimethyl-pyrazine-dicarboxylic acid-(2.3): 5.6-dimethyl-pyrazine-dicarboxylic acid-(2.3)

: 5910-89-4
2,3-dimethylpyrazine

Conditions

Conditions	Yield
With acetic acid at 180℃; im Rohr;

: 2280-44-6
D-Glucose

: 61-90-5
L-leucine

A: 290-37-9
1,4-pyrazine

B: 109-08-0
2-Methylpyrazine

C: 123-32-0
2,5-dimethyl-pyrazine

D: 5910-89-4
2,3-dimethylpyrazine

E: 108-50-9
2,6-dimethylpyrazine

F: 14667-55-1
2,3,5-trimethylpyrazine

G var. alkyl substituted pyrazines: var. alkyl substituted pyrazines

Conditions

Conditions	Yield
With ammonium hydroxide In glycerol at 120℃; for 4h; Product distribution; var. times, solvents, temp., and ratios of reactants, also without leucine;

...Expand

: 50-99-7
D-glucose

: 134276-45-2
H-Lys-Lys-OH hydrochloride

A: 290-37-9
1,4-pyrazine

B: 109-08-0
2-Methylpyrazine

C: 123-32-0
2,5-dimethyl-pyrazine

D: 5910-89-4
2,3-dimethylpyrazine

E: 13360-65-1
2-ethyl-3,6-dimethylpyrazine

F: 108-50-9
2,6-dimethylpyrazine

G: 14667-55-1
2,3,5-trimethylpyrazine

H: 80935-98-4
3-ethenyl-2,5-dimethylpyrazine

I: 13925-03-6
2-ethyl-6-methylpyrazine

Conditions

Conditions	Yield
In water at 130℃; for 2h; pH=8; Maillard reaction;

...Expand

: 134276-45-2
H-Lys-Lys-OH hydrochloride

: 78-98-8
2-oxopropanal

A: 109-08-0
2-Methylpyrazine

B: 123-32-0
2,5-dimethyl-pyrazine

C: 5910-89-4
2,3-dimethylpyrazine

D: 13360-65-1
2-ethyl-3,6-dimethylpyrazine

E: 108-50-9
2,6-dimethylpyrazine

F: 55138-74-4
3,5-dimethyl-2-(Z-1-propenyl)-pyrazine

G: 14667-55-1
2,3,5-trimethylpyrazine

H: 80935-98-4
3-ethenyl-2,5-dimethylpyrazine

I: 13925-07-0
2-ethyl-3,5-dimethylpyrazine

J: 15707-34-3
2,3-dimethyl-5-ethylpyrazine

Conditions

Conditions	Yield
In water at 130℃; for 2h; pH=8; Maillard reaction;

...Expand

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Chemistry

Molecular Formula: C₆H₈N₂
Formula Weight: 108.14
mp of 2,3-DIMETHYLPYRAZINE (5910-89-4): 11-13 °C
bp of 2,3-DIMETHYLPYRAZINE (5910-89-4): 156 °C(lit.)
density : 1.02
refractive index : n20/D 1.507(lit.)
Fp of 2,3-DIMETHYLPYRAZINE (5910-89-4): 130 °F
storage temp. : Flammables area
PHYSICAL STATE: clear to pale yellow liquid

Uses

2,3-DIMETHYLPYRAZINE (5910-89-4) is used as a composition of flavouring, mainly for confecting essence of meat, nuts, chocolate, coffee, cream and tobacco.

Production

By heating the reaction product of diacetyl and quadrol with potassium hydroxide in the ethanol to form 2,3-DIMETHYLPYRAZINE (5910-89-4). 2,3-DIMETHYLPYRAZINE (5910-89-4) is also formed during the cooking of some foods via Maillard reactions.

Toxicity Data With Reference

1.		orl-rat LD50:613 mg/kg		DCTODJ Drug and Chemical Toxicology. 3 (1980),249.
2.		ipr-mus LD50:1390 mg/kg		TXAPA9 Toxicology and Applied Pharmacology. 17 (1970),244.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Hazard Codes : Xn,F,Xi (Harmful; Highly Flammable; Irritant)
Risk Statements : 10-22-37/38-41 (Flammable; Harmful if swallowed; Irritating to respiratory system and skin; Risk of serious damage to eyes)
Safety Statements : 16-26-39 (Keep away from sources of ignition - No smoking; In case of contact with eyes, rinse immediately with plenty of water and seek medical advice; Wear eye/face protection)
RIDADR : UN 1993 3/PG 3
WGK Germany : 3
RTECS : UQ2625000
Hazard Note : Irritant/Flammable
HazardClass : 3
PackingGroup : III
HS Code : 29339990
Moderately toxic by ingestion and intraperitoneal routes. Flammable liquid when exposed to heat, sparks, or flame. When heated to decomposition it emits toxic fumes of NO_x.

Standards and Recommendations

ASSAY (G.C): 98.0% min