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Pyrazine

Pyrazine Suppliers list
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Products Intro: Product Name:Pyrazine
CAS:290-37-9
Purity:99.9% Package:1kg;50USD
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Products Intro: Product Name:Pyrazine
CAS:290-37-9
Purity:98%(Min,HPLC) Package:100g;1kg;5kg,10kg,25kg,50kg
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CAS:290-37-9
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CAS:290-37-9
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Products Intro: Product Name:Pyrazine
CAS:290-37-9
Purity:98% Package:25KG;100USD

Pyrazine manufacturers

  • Pyrazine
  • Pyrazine pictures
  • $2.00 / 25KG
  • 2024-03-29
  • CAS:290-37-9
  • Min. Order: 1KG
  • Purity: 99%
  • Supply Ability: 200mt/year
  • Pyrazine
  • Pyrazine pictures
  • $50.00 / 1kg
  • 2023-07-11
  • CAS:290-37-9
  • Min. Order: 1kg
  • Purity: 99.9%
  • Supply Ability: 10000MT
Pyrazine Basic information
Description References
Product Name:Pyrazine
Synonyms:1$l^{5},4-pyrazin-1-yliuM-1-yl;FEMA 4015;FEMA NUMBER 4015;1,4-Diazabenzene;p-Diazine;1,4-DIAZINE;zhejiangjianfengpharmaceuticalholdingspyrazine;PYRAZINE MIXTURE
CAS:290-37-9
MF:C4H4N2
MW:80.09
EINECS:206-027-6
Product Categories:Building Blocks;Chemical Synthesis;Alphabetical Listings;Flavors and Fragrances;O-P;Building Blocks;Heterocyclic Building Blocks;Chloropyrazines, etc.;Pyrazines;Pyridines ,Halogenated Heterocycles;Heterocyclic Building Blocks;bc0001
Mol File:290-37-9.mol
Pyrazine Structure
Pyrazine Chemical Properties
Melting point 50-56 °C (lit.)
Boiling point 115-116 °C (lit.)
density 1.031 g/mL at 25 °C (lit.)
refractive index 1.5235
FEMA 4015 | PYRAZINE
Fp 132 °F
storage temp. Store below +30°C.
solubility SOLUBLE
pka0.65(at 27℃)
form Crystals
color White
Specific Gravity1.031
Odorat 0.10 % in propylene glycol. pungent sweet corn like roasted hazelnut barly
Odor Typenutty
Water Solubility SOLUBLE
Sensitive Hygroscopic
JECFA Number951
Merck 14,7957
BRN 103905
Dielectric constant2.7999999999999998
Stability:Stable. Highly flammable. Incompatible with acids, oxidizing agents.
LogP-0.26
CAS DataBase Reference290-37-9(CAS DataBase Reference)
NIST Chemistry ReferencePyrazine(290-37-9)
EPA Substance Registry SystemPyrazine (290-37-9)
Safety Information
Hazard Codes Xi,F
Risk Statements 36/37/38-11
Safety Statements 26-36-16
RIDADR UN 1325 4.1/PG 2
WGK Germany 3
RTECS UQ2015000
TSCA T
HazardClass 4.1
PackingGroup III
HS Code 29339990
MSDS Information
ProviderLanguage
1,4-Diazine English
SigmaAldrich English
ACROS English
ALFA English
Pyrazine Usage And Synthesis
DescriptionPyrazine 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 Propertieswhite crystals or powder
Chemical PropertiesPyrazine has a strong pyridine-like odor. Some reports compare the taste of pyrazine to cooked spinach or rancid peanuts
OccurrencePyrazine 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).
UsesPyrazine is used as a flavoring agent. It serves as a component of some herbs in traditional Chinese medicine. It is employed as pharmaceutical intermediates, perfume intermediates and involved in the preparation of other chemicals. In addition to this, it is used in the production of pyrazine 1-oxide.
PreparationPrepared 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.
Definitionpyrazine: 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.
DefinitionA heterocyclic aromatic compound with a six-membered ring containing four carbon atoms and two nitrogen atoms.
DefinitionChEBI: A diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms.
Aroma threshold values300 ppm (odor threshold in water)
General DescriptionPyrazine is a 1,4-diazine and an electron-deficient N-heteroarene found in several natural products, APIs, agrochemicals, and functional materials.
Purification MethodsDistil 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.]
Tag:Pyrazine(290-37-9) Related Product Information
DBU Sulfanilic acid Methylparaben p-Toluic acid p-Phenylenediamine Glipizide 4-Aminobenzoic acid 4-Nitrobenzoic acid 4-Hydroxybenzoic acid 4-Hydroxybenzaldehyde 2-cyclohexyl-carbonyl-1,3,4,6,7,11b-hexahydro-2h-pyrazine(2,1-a)isoquinoline-4-one Pyrazole Phenazine 2,3-Pyrazinedicarboxylic acid 2-Pyrazinecarboxylic acid ALLOXAZINE 2-Chloropyrazine LUMICHROME