| Identification | More | [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 Properties | Back 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 Data | Back 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. |
| Questions And Answer | Back 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 Information | Back 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 |
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