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2-Methoxy-3-isobutyl pyrazine

2-Methoxy-3-isobutyl pyrazine Basic information
Product Name:2-Methoxy-3-isobutyl pyrazine
Synonyms:2-ISOBUTYL-3(5/6)-METHOXYPYRAZINE;2-methoxy-3-(2-methyl-propyl) pyrazine;2-methoxy-3-(2-methylpropyl)-pyrazin;2-methoxy-3-(2-methylpropyl)-Pyrazine;3-methoxy-2-isobutylpyrazine;Pyrazine, 2-(2-methylpropyl)-3-methoxy;Pyrazine, 2-isobutyl-3-methoxy;Pyrazine, 3-methoxy-2-(2-methylpropyl)
CAS:24683-00-9
MF:C9H14N2O
MW:166.22
EINECS:246-402-1
Product Categories:500 Series Drinking Water Methods;Drinking WaterEPA;Odor Standards;Chromatography;Environmental Standards;Alphabetical Listings;Flavors and Fragrances;I-L;Building Blocks;Heterocyclic Building Blocks;Pyrazine;Heterocyclic Compounds;Alkoxypyrazines;Mono- & Polyalkylpyrazines;pyrazine Flavor;Pyrazines
Mol File:24683-00-9.mol
2-Methoxy-3-isobutyl pyrazine Structure
2-Methoxy-3-isobutyl pyrazine Chemical Properties
Boiling point 294.44°C (rough estimate)
density 0.99 g/mL at 25 °C(lit.)
refractive index n20/D 1.49(lit.)
FEMA 3132 | 2-ISOBUTYL-3-METHOXYPYRAZINE
Fp 176 °F
storage temp. room temp
pka0.80±0.10(Predicted)
form Liquid
color Clear colorless
Specific Gravity0.995
Odorgreen-pepper odor FCT 2000
Odor Typegreen
JECFA Number792
LogP2.62
CAS DataBase Reference24683-00-9(CAS DataBase Reference)
NIST Chemistry ReferencePyrazine, 2-methoxy-3-(2-methylpropyl)-(24683-00-9)
EPA Substance Registry SystemPyrazine, 2-methoxy-3-(2-methylpropyl)- (24683-00-9)
Safety Information
Hazard Codes Xi,T,F
Risk Statements 36/37/38-39/23/24/25-23/24/25-11
Safety Statements 26-36-24/25-45-36/37-16-7
RIDADR UN 1230 3/PG 2
WGK Germany 3
TSCA Yes
HS Code 29339900
MSDS Information
ProviderLanguage
3-Isobutyl-2-methoxypyrazine English
SigmaAldrich English
ACROS English
ALFA English
2-Methoxy-3-isobutyl pyrazine Usage And Synthesis
Description2-Isobutyl-3-methoxypyrazine has an extremely powerful odor with a reported threshold value of 2 parts per trillion in water. Diluted water solutions exhibit a characteristic odor of green bell peppers. May be synthesized by condensation of leucine amide with glyoxal, followed by methylation with CH2H2.
Chemical PropertiesCLEAR COLOURLESS LIQUID
Chemical Properties2-Isobutyl-3-methoxypyrazine has a green bell pepper, green pea odor. Diluted water solutions of this compound exhibit a characteristic odor of green bell peppers.
OccurrenceReported present in green bell pepper, coffee, galbanum oil, potato products, peas, grapes, lettuce, sherry, white wine, cocoa, beans, beetroot, passion fruit and okra.
Uses2-Isobutyl-3-methoxypyrazine has been employed as a model odorant molecule during an electrochemical assay for the detection of odorant molecules based on a rat odorant-binding protein (rOBP3).
PreparationBy condensation of leucine amide with glyoxal followed by methylation with CH2H2
Aroma threshold valuesDetection: 2 ppt to 10 ppb
General Description2-Isobutyl-3-methoxypyrazine, a potent bell-pepper odourant, has been found to bind to cow olfactory mucosa homogenate.
2-Methoxy-3-isobutyl pyrazine Preparation Products And Raw materials
Raw materialsMethanol-->Glyoxal
2-Methylpyrazine Pyrazine 2-Methoxy-3-methylpyrazine 2-ISOBUTYL-3-METHOXY-D3-PYRAZINE Phenylacetic acid isobutyl ester 2-METHOXY-3-N-PROPYLPYRAZINE 2-Methoxy-3-isobutyl pyrazine Methoxy 2-Methoxypyrazine Ethylpyrazine 2-HYDROXYPYRAZINE Pyrazinamide 2-Propylpyrazine 2-Ethyl-3-methoxypyrazine Sulfachoropyrazine sodium 2-Hydroxy-3-methylpyrazine Glipizide 2-ISOBUTYLPYRAZINE
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