CasNo.290-37-9,290-37-9 PyrazineCAS NO.: 290-37-9,(290-37-9) Suppliers

1 Kilogram	FOB Price:USD 4.0000 -5.0000

Min.Order :1 Kilogram
Purity: 99%
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Keywords

Pyrazine FEMA 4015 1,4-Diazabenzene

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Appearance:powder
Application:Synthetic fragrances
PackAge:drum
ProductionCapacity:10000|Gram|Day
Storage:Room temperature
Transportation:By sea or by air

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Description	Pyrazine is a heterocyclic aromatic organic compound and can be reacted to obtain diverse pyrazine derivatives. Pyrazines are important contributors to the flavor of various roasted, toasted, or similarly heated foods. Pyrazine derivatives exhibit a wide variety of aromas in food, e.g. 2-methoxy-3-isopropylpyrazine produces a green pea odor. Pyrazines and pyrazine derivatives are typically used as flavor agent. Pyrazines and Pyrazine derivatives are also used as fragrances.
References	[1] T.B. Adamsa, J. Doullb, V.J. Feronc, J.I. Goodmand, L.J. Marnette, I.C. Munrof, P.M. Newberneg, P.S. Portogheseh, R.L. Smithi, W.J. Waddellj and B.M. Wagnerk, The FEMA GRAS assessment of pyrazine derivatives used as flavor ingredients, Food and Chemical Toxicology, 2002, vol. 40, 429-451
Chemical Properties	white crystals or powder
Chemical Properties	Pyrazine has a strong pyridine-like odor. Some reports compare the taste of pyrazine to cooked spinach or rancid peanuts
Occurrence	Pyrazine has been detected in several food products including papayas, asparagus, peanuts, popcorn, soybeans, corn, French fries, bread, cheese, milk, eggs (boiled), chicken (fried), beef (cooked), shrimp, clams, beer, sherry, malt, coffee and tea (green).
Preparation	Prepared by cyclization of α-amino ketones, which were produced by the reduction of isonitroso ketones to yield the dihydropyrazines, which are dehydrogenated with mercury(I) oxide or copper(II) sulfate or sometimes with atmospheric oxygen.
Definition	ChEBI: A diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms.
Definition	A heterocyclic aromatic compound with a six-membered ring containing four carbon atoms and two nitrogen atoms.
Definition	pyrazine: An unsaturated heterocycliccompound having two nitrogenatoms in a six-membered ring,C₄H₄N₂; r.d. 1.03; m.p. 52°C; b.p.115°C. Pyrazine is a symmetric diazine.
Aroma threshold values	300 ppm (odor threshold in water)
Purification Methods	Distil pyrazine in steam and crystallise it from water. Purify also by zone melting. [Beilstein 23 H 91, 23 II 80, 23 III/IV 899, 23/5 V 351.]