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290-37-9 PyrazineCAS NO.: 290-37-9 CAS NO.290-37-9
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- Min.Order: 1 Kilogram
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- Product Details
Keywords
- Pyrazine
- FEMA 4015
- 1,4-Diazabenzene
Quick Details
- ProName: 290-37-9 PyrazineCAS NO.: 290-37-9
- CasNo: 290-37-9
- Molecular Formula: C4H4N2
- Appearance: powder
- Application: Synthetic fragrances
- DeliveryTime: In stock
- PackAge: drum
- Port: China main port
- ProductionCapacity: 10000 Gram/Day
- Purity: 99%
- Storage: Room temperature
- Transportation: By sea or by air
- LimitNum: 1 Kilogram
- first class: 1-10
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Details
| 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| Definition | ChEBI: A diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms.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.] |