4- (2-pyridylazo) resorcinol

from Wikipedia, the free encyclopedia
Structural formula
Structural formula of 4- (2-pyridylazo) resorcinol
General
Surname 4- (2-pyridylazo) resorcinol
other names
  • 4 - [( E ) -2-pyridinyldiazenyl] -1,3-benzenediol ( IUPAC )
  • PAR, pyridylazoresorcinol
Molecular formula C 11 H 9 N 3 O 2
Brief description

orange solid

External identifiers / databases
CAS number
  • 1141-59-9
  • 13311-52-9 (monosodium salt)
  • 16593-81-0 (monosodium salt monohydrate)
EC number 214-528-6
ECHA InfoCard 100.013.207
PubChem 65069
ChemSpider 10466383
Wikidata Q27284605
properties
Molar mass 237.19 g mol −1
Physical state

firmly

Melting point
solubility

soluble in water (sodium salt monohydrate, 38 g l −1 at 20 ° C)

safety instructions
GHS labeling of hazardous substances
07 - Warning

Caution

H and P phrases H: 315-319-335
P: 280-302 + 352-304 + 340-312-332 + 313-337 + 313
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

4- (2-Pyridylazo) resorcinol is a chemical compound from the group of azo dyes and is the coupling product of diazotized 2-aminopyridine on resorcinol .

properties

4- (2-Pyridylazo) resorcinol is an orange solid in its pure form and a dark brown solid as the sodium salt .

use

4- (2-pyridylazo) resorcinol is in the chelate - titration of aluminum , mercury , lead used and nickel. It can also be used as a reagent in the colorimetric analysis of gold , cobalt , chromium and iron as well as in the cloud point extraction of copper , zinc, cadmium and nickel in water samples. It is also used in studies of zinc output from the Escherichia coli aspartate - transcarbamylase used.

Individual evidence

  1. ↑ a b c d e f Data sheet 4- (2-Pyridylazo) resorcinol, 99% from AlfaAesar, accessed on February 17, 2019 ( PDF )(JavaScript required) .
  2. ↑ External identifiers or database links to 4- (2-pyridylazo) resorcinol sodium monohydrate : CAS number: 16593-81-0, EC number: 629-305-2, ECHA InfoCard: 100.157.498 , ChemSpider : 17961146 , Wikidata : Q3599029 .
  3. ↑ a b Data sheet 4- (2-Pyridylazo) resorcinol, 96% from Sigma-Aldrich , accessed on February 17, 2019 ( PDF ).
  4. ↑ Data sheet 4- (2-Pyridylazo) resorcinol monosodium salt monohydrate from AlfaAesar, accessed on February 17, 2019 ( PDF )(JavaScript required) .
  5. ↑ Keihei Ueno, Toshiaki Imamura, KL Cheng: Handbook of Organic Analytical Reagents . 2nd Edition. CRC Press, Boca Raton, London, New York, Washington 1992, ISBN 978-0-8493-4287-5 ( limited preview in Google Book Search).
  6. ↑ Data sheet 4- (2-Pyridylazo) resorcinol monosodium salt hydrate from Sigma-Aldrich , accessed on February 17, 2019 ( PDF ).
  7. ↑ J. Ghasemi, H. Peyman, M. Meloun: Study of Complex Formation between 4- (2-Pyridylazo) Resorcinol and Al 3+ , Fe 3+ , Zn 2+ , and Cd 2+ Ions in an Aqueous Solution at 0.1 M ionic strength. In: Journal of Chemical & Engineering Data 52, 2007, pp. 1171-1178, doi : 10.1021 / je060325g .
  8. ↑ M. Hniličková, L. Sommer: 4- (2-pyridylazo) resorcin as a chelatometric indicator , in: Collect. Czech. Chem. Commun. 26, 1961, pp. 2189-2205, doi : 10.1135 / cccc19612189 .