Pyrazin

Bezeichnung:Pyrazin

CAS-Nr290-37-9

Englisch Name:Pyrazine

CBNumberCB1450659

SummenformelC4H4N2

Molgewicht80.09

MOL-Datei290-37-9.mol

Synonyma

Pyrazin

Pyrazin physikalisch-chemischer Eigenschaften

Schmelzpunkt	50-56 °C (lit.)
Siedepunkt	115-116 °C (lit.)
Dichte	1.031 g/mL at 25 °C (lit.)
Brechungsindex	1.5235
FEMA	4015 \| PYRAZINE
Flammpunkt	132 °F
storage temp.	Store below +30°C.
Löslichkeit	SOLUBLE
pka	0.65(at 27℃)
Aggregatzustand	Crystals
Farbe	White
Wichte	1.031
Geruch (Odor)	at 0.10 % in propylene glycol. pungent sweet corn like roasted hazelnut barly
Geruchsart	nutty
Wasserlöslichkeit	SOLUBLE
Sensitive	Hygroscopic
JECFA Number	951
Merck	14,7957
BRN	103905
Dielectric constant	2.7999999999999998
Stabilität	Stable. Highly flammable. Incompatible with acids, oxidizing agents.
LogP	-0.26
CAS Datenbank	290-37-9(CAS DataBase Reference)
NIST chemische Informationen	Pyrazine(290-37-9)
EPA chemische Informationen	Pyrazine (290-37-9)

Sicherheit

Kennzeichnung gefährlicher	Xi,F
R-Sätze:	36/37/38-11
S-Sätze:	26-36-16
RIDADR	UN 1325 4.1/PG 2
WGK Germany	3
RTECS-Nr.	UQ2015000
TSCA	T
HazardClass	4.1
PackingGroup	III
HS Code	29339990

Gefahreninformationscode (GHS)

Pyrazine Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
Chemische Eigenschaften
white crystals or powder
Chemische Eigenschaften
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).
Verwenden
Pyrazine 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.
synthetische
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
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.
Definition
A heterocyclic aromatic compound with a six-membered ring containing four carbon atoms and two nitrogen atoms.
Definition
ChEBI: A diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms.
Aroma threshold values
300 ppm (odor threshold in water)
Allgemeine Beschreibung
Pyrazine is a 1,4-diazine and an electron-deficient N-heteroarene found in several natural products, APIs, agrochemicals, and functional materials.
läuterung methode
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.]

Pyrazine Upstream-Materialien And Downstream Produkte

Pyrazin Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

290-37-9, Pyrazine Verwandte Suche:

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