ChemicalBook--->CAS DataBase List--->3149-28-8

3149-28-8

3149-28-8 Structure

3149-28-8 Structure
IdentificationMore
[Name]

2-Methoxypyrazine
[CAS]

3149-28-8
[Synonyms]

2-METHOXYPYRAZINE
FEMA 3302
FEMA NUMBER 3302
METHOXYPYRAZINE
METHOXYPYRAZINE, 2-
methoxy-pyrazin
2-METHOXYPYRAZINE 99+% FCC
2-Methoxypyrazine,98%
Methoxypyrazine,98%
Pyrazine, methoxy-
METHOXYPYRAZINE, 2-(SG)
2-METHOXY PYRAZINE FEMA NO.3302
[EINECS(EC#)]

221-579-8
[Molecular Formula]

C5H6N2O
[MDL Number]

MFCD00006126
[Molecular Weight]

110.11
[MOL File]

3149-28-8.mol
Chemical PropertiesBack Directory
[Boiling point ]

60-61 °C/29 mmHg (lit.)
[density ]

1.14 g/mL at 25 °C(lit.)
[FEMA ]

3302
[refractive index ]

n20/D 1.509(lit.)
[Fp ]

114 °F
[storage temp. ]

Sealed in dry,Room Temperature
[form ]

clear liquid
[pka]

0.53±0.10(Predicted)
[color ]

Colorless to Almost colorless
[Specific Gravity]

1.140
[Odor]

at 1.00 % in dipropylene glycol. sweet nutty cocoa
[Odor Type]

chocolate
[JECFA Number]

787
[BRN ]

2241
[LogP]

0.75
[CAS DataBase Reference]

3149-28-8(CAS DataBase Reference)
[NIST Chemistry Reference]

Pyrazine, methoxy-(3149-28-8)
[EPA Substance Registry System]

3149-28-8(EPA Substance)
Safety DataBack Directory
[Hazard Codes ]

Xn
[Risk Statements ]

R10:Flammable.
R22:Harmful if swallowed.
R37/38:Irritating to respiratory system and skin .
R41:Risk of serious damage to eyes.
[Safety Statements ]

S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S39:Wear eye/face protection .
[RIDADR ]

UN 1993 3/PG 3
[WGK Germany ]

3
[TSCA ]

Yes
[HazardClass ]

3
[PackingGroup ]

III
[HS Code ]

29339990
[Safety Profile]

Skin and eye irritant. When heated to decomposition it emits toxic fumes of NOx.
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Sodium Methoxide-->2-HYDROXYPYRAZINE-->Pyrazine, 2-methoxy-, 1-oxide-->3-Methoxypyrazine 1-oxide-->5-Methoxy-2-chloropyrazine-->2-CHLORO-6-METHOXYPYRAZINE-->2-CHLORO-3-METHOXYPYRAZINE
Material Safety Data Sheet(MSDS)Back Directory
[msds information]

2-Methoxypyrazine(3149-28-8).msds
Questions And AnswerBack Directory
[Description]

2-methoxypyrazine is a kind of pyrazine derivative. It emits a kernels and cocoa-like aroma. It is a commonly used daily, food flavoring agent. It has many kinds of flavoring derivatives such as 3-Isobutyl-2-methoxypyrazine, 3-sec-butyl-2-methoxypyrazine, 3-alkyl-2-methoxypyrazines and 3-isopropyl-2-methoxypyrazine. There derivatives could be found in wine and many kinds of fruits such as berry and grapes.
[References]

Murray, K. E., J. Shipton, and F. B. Whitfield. "2-methoxypyrazines and the flavour of green peas (Pisum sativum). " Chemistry & Industry 27.14(1970):897-898.
Hashizume, Katsumi, and Takashi Samuta. "Grape maturity and light exposure affect berry methoxypyrazine concentration." American Journal of Enology and Viticulture 50.2 (1999): 194-198.
Hartmann, Peter J., Harold M. McNair, and Bruce W. Zoecklein. "Measurement of 3-alkyl-2-methoxypyrazine by headspace solid-phase microextraction in spiked model wines." American Journal of Enology and Viticulture 53.4 (2002): 285-288.
HASHiZUME, Katsumi, and Norihiko Umeda. "Methoxypyrazine content of Japanese red wines." Bioscience, biotechnology, and biochemistry 60.5 (1996): 802-805.
Lacey, Michael J., et al. "Methoxypyrazines in Sauvignon blanc grapes and wines." American Journal of Enology and Viticulture 42.2 (1991): 103-108.
Hazard InformationBack Directory
[Chemical Properties]

Colorless liquid
[Chemical Properties]

Methoxypyrazine has a sweet, nutty, cocoa odor. Methoxypyrazine contributes a distinctive “green, capsicum (bell pepper), herbaceous and earthy” aroma that is quite characteristic of certain wines, such as sauvignon blanc and cabernet sauvignon.
[Occurrence]

Present at ultra-trace levels in sauvignon blanc and cabernet sauvignon grapes and wine. Methoxypyrazine contributes a distinctive wine aroma, even at low parts per trillion levels. Also reported found in cooked beef, cocoa, malt and krill.
[Definition]

ChEBI: Methoxypyrazine is an aromatic ether and a member of pyrazines.
[Preparation]

From 2-hydroxypyrazine by various routes.
[Aroma threshold values]

700 ppb in water
Spectrum DetailBack Directory
[Spectrum Detail]

2-Methoxypyrazine(3149-28-8)MS
2-Methoxypyrazine(3149-28-8)1HNMR
2-Methoxypyrazine(3149-28-8)IR1
Well-known Reagent Company Product InformationBack Directory
[Alfa Aesar]

2-Methoxypyrazine, 98%(3149-28-8)
[Sigma Aldrich]

3149-28-8(sigmaaldrich)
[TCI AMERICA]

2-Methoxypyrazine,>98.0%(GC)(3149-28-8)
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