ChemicalBook > CAS DataBase List > 4-Phenylurazole

4-Phenylurazole

Product Name
4-Phenylurazole
CAS No.
15988-11-1
Chemical Name
4-Phenylurazole
Synonyms
4-Phenylurazol;AURORA KA-3647;4-PHENYLURAZOLE;4-phenyl urea yl;Urazole, 4-phenyl-;4-Phenylurazole>4-PHENYLURAZOLE 99.0%;4-Phenylurazole, 98+%;Calcitriol Impurity 5;Bicarbamimide, N-phenyl-
CBNumber
CB2720962
Molecular Formula
C8H7N3O2
Formula Weight
177.16
MOL File
15988-11-1.mol
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4-Phenylurazole Property

Melting point:
207-209 °C (lit.)
Boiling point:
309.07°C (rough estimate)
Density 
1.3393 (rough estimate)
refractive index 
1.6500 (estimate)
storage temp. 
Inert atmosphere,2-8°C
pka
5.43±0.30(Predicted)
form 
powder to crystal
color 
White to Almost white
BRN 
163361
InChIKey
GOSUFRDROXZXLN-UHFFFAOYSA-N
CAS DataBase Reference
15988-11-1(CAS DataBase Reference)
NIST Chemistry Reference
4-Phenylurazole(15988-11-1)
EPA Substance Registry System
1,2,4-Triazolidine-3,5-dione, 4-phenyl- (15988-11-1)
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Safety

Safety Statements 
22-24/25
WGK Germany 
3
TSCA 
Yes
HS Code 
29339990
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
188956
Product name
4-Phenylurazole
Purity
98%
Packaging
25g
Price
$113
Updated
2024/03/01
TCI Chemical
Product number
P1160
Product name
4-Phenylurazole
Purity
>98.0%(T)
Packaging
5g
Price
$35
Updated
2024/03/01
TCI Chemical
Product number
P1160
Product name
4-Phenylurazole
Purity
>98.0%(T)
Packaging
25g
Price
$88
Updated
2024/03/01
Alfa Aesar
Product number
L00255
Product name
4-Phenylurazole, 98+%
Packaging
5g
Price
$27.65
Updated
2024/03/01
Alfa Aesar
Product number
L00255
Product name
4-Phenylurazole, 98+%
Packaging
25g
Price
$90.65
Updated
2024/03/01
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4-Phenylurazole Chemical Properties,Usage,Production

Description

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.

Chemical Properties

white to light beige cryst. powder or granules

Uses

Precursor to the Diels-Alder trapping agent, 4-phenyl-1,2,4-triazoline-3,5-dione.1,2,3

General Description

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.

Purification Methods

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.]

References

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 Preparation Products And Raw materials

Raw materials

Phenyl isocyanate Potassium hydroxide solution Semicarbazide Diethyl carbonate

Preparation Products

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4-Phenylurazole Suppliers

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View Lastest Price from 4-Phenylurazole manufacturers

Career Henan Chemical Co
Product
4-Phenylurazole 15988-11-1
Price
US $9.80/KG
Min. Order
1g
Purity
≥99%
Supply Ability
100kg
Release date
2020-01-08

15988-11-1, 4-PhenylurazoleRelated Search:

FLAVANONE Triadimefon 1-PHENYL-2-THIOUREA Triphenylphosphine oxide Furazolidone Diphenyl ether Linezolid Polyvinylpyrrolidone Triphenylphosphine PHENYL VALERATE (FORMYLMETHYLENE)TRIPHENYLPHOSPHORANE 2-Phenylphenol PHENYL RESIN Phenylacetone Phenyl isocyanate Phenylacetic acid URAZOLE Phenylurea

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