4-Phenylurazole Struktur

4-Phenyl-1,2,4-triazolidin-3,5-dion

Bezeichnung:4-Phenyl-1,2,4-triazolidin-3,5-dion

CAS-Nr15988-11-1

Englisch Name:4-Phenylurazole

CBNumberCB2720962

SummenformelC8H7N3O2

Molgewicht177.16

MOL-Datei15988-11-1.mol

Synonyma

4-Phenyl-1,2,4-triazolidin-3,5-dion

4-Phenyl-1,2,4-triazolidin-3,5-dion physikalisch-chemischer Eigenschaften

Schmelzpunkt	207-209 °C (lit.)
Siedepunkt	309.07°C (rough estimate)
Dichte	1.3393 (rough estimate)
Brechungsindex	1.6500 (estimate)
storage temp.	Inert atmosphere,2-8°C
pka	5.43±0.30(Predicted)
Aggregatzustand	powder to crystal
Farbe	White to Almost white
BRN	163361
InChIKey	GOSUFRDROXZXLN-UHFFFAOYSA-N
CAS Datenbank	15988-11-1(CAS DataBase Reference)
NIST chemische Informationen	4-Phenylurazole(15988-11-1)
EPA chemische Informationen	1,2,4-Triazolidine-3,5-dione, 4-phenyl- (15988-11-1)

Sicherheit

S-Sätze:	22-24/25
WGK Germany	3
TSCA	Yes
HS Code	29339990

Gefahreninformationscode (GHS)

4-Phenylurazole Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
4-phenylurazole is a kind of laboratory chemicals used for the manufacturing of some substances. It can be used as the precursor to the Diels-Alder trapping agent, 4-phenyl-1, 2, 4-triazoline-3, 5-Dione. Its derivative, azo dyes, has wide applications in dyes industry. In the presence of phosgene, terephthaloyl chloride and epichlorohydrin, it can be polymerized to yield insoluble polymer.
Chemische Eigenschaften
white to light beige cryst. powder or granules
Verwenden
Precursor to the Diels-Alder trapping agent, 4-phenyl-1,2,4-triazoline-3,5-dione.1,2,3
Allgemeine Beschreibung
4-Phenylurazole undergoes oxidation in the presence of NO₂-N₂O₄ to yield 4-phenyl-1,2,4-trizoline-3,5-dione. It undergoes acetylation reaction with excess acetyl chloride in N,N-dimethylacetamide solution. It polymerizes in the presence of phosgene, terephthaloyl chloride and epichlorohydrin to yield insoluble polymer. It is precursor to the Diels-Alder trapping agent, 4-phenyl-1,2,4-triazoline-3,5-dione. This urazole was recently demonstrated in the traceless, chemoselective labeling of peptides and proteins through electrochemical tyrosine-click (e-Y-CLICK) chemistry.
läuterung methode
Crystallise 4-phenylurazole from water or 95% EtOH. Dissolve 35g in 80mL of boiling 95% EtOH and on cooling 90-95% is recovered with m 209-210o. It has IR with 1685 and 3120cm-1. [Cookson et al. Org max Synth 51 121 1971, Beilstein 26 I 64, 26 III/IV 540.]
Einzelnachweise
http://www.sigmaaldrich.com/catalog/product/aldrich/188956?lang=en&region=US&gclid=EAIaIQobChMI6r7k0eu71gIV1IZoCh0nwgLjEAAYASAAEgI0tvD_BwE
http://nopr.niscair.res.in/handle/123456789/21799

4-Phenylurazole Upstream-Materialien And Downstream Produkte

4-Phenyl-1,2,4-triazolidin-3,5-dion Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

15988-11-1, 4-Phenylurazole Verwandte Suche:

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