1-(2-Pyridylazo)-2-naphthol

Bezeichnung:1-(2-Pyridylazo)-2-naphthol

CAS-Nr85-85-8

Englisch Name:1-(2-Pyridylazo)-2-naphthol

CBNumberCB0322603

SummenformelC15H11N3O

Molgewicht249.27

MOL-Datei85-85-8.mol

Synonyma

1-(2-Pyridylazo)-2-naphthol

1-(2-Pyridylazo)-2-naphthol physikalisch-chemischer Eigenschaften

Schmelzpunkt	138-141 °C (lit.)
Siedepunkt	392.37°C (rough estimate)
Dichte	1.1469 (rough estimate)
Brechungsindex	1.5700 (estimate)
storage temp.	Store at +5°C to +30°C.
Löslichkeit	Practically insoluble[in water]
Aggregatzustand	Powder/Solid
pka	8.86±0.50(Predicted)
Farbe	green to red, upon chelation with metal
Wasserlöslichkeit	Insoluble
BRN	206390
Stabilität	Stable. Incompatible with strong oxidizing agents, strong bases.
CAS Datenbank	85-85-8(CAS DataBase Reference)
NIST chemische Informationen	2-Naphthalenol, 1-(2-pyridinylazo)-(85-85-8)
EPA chemische Informationen	2-Naphthalenol, 1-(2-pyridinylazo)- (85-85-8)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36-37/39
WGK Germany	3
TSCA	Yes
HS Code	29333999

Gefahreninformationscode (GHS)

1-(2-Pyridylazo)-2-naphthol Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
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.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
orange crystals
Verwenden
1-(2-Pyridylazo)-2-naphthol is an indicator of transition metals. 1-(2-Pyridylazo)-2-naphthol is an indicator in complexometry and a reagent for the extraction and spectrophotometric determination of many transition metals. Dyes and metabolites.
Definition
ChEBI: 1-(2-pyridin-2-yldiazenyl)-2-naphthol is a member of naphthols.
Allgemeine Beschreibung
1-(2-Pyridylazo)-2-naphthol (PAN), an orange colored dye, is commonly used as an acid-base indicator. It can form chelates with metal ions, which makes it a valuable indicator in complexometric titrations. PAN is also a spectrophotometric reagent, which can extract metal chelates into an organic solvent.
Landwirtschaftliche Anwendung
1-(2-Pyridylazo)-2-naphthol is a hard stratum of strongly compacted soil caused by continual plowing to the same depth of hardened soil which has high clay content. The precipitated iron and silicates cement the soil particles and form pans. 1-(2-Pyridylazo)-2-naphthol often impede drainage and root growth. It can be broken up using a subsoiler .
läuterung methode
Purify PAN by repeated crystallisation from EtOH or MeOH. It can also be purified by sublimation under vacuum. Purity can be checked by TLC using a mixed solvent (pet ether/Et2O/EtOH; 10:10:1) on a silica gel plate. It has pK1 1.9 and pK2 12.2 in 20% aqueous ethoxyethanol. It chelates with copper [Pease & Williams Anal Chem 31 1046 1959]. [Beilstein 22 I 694, 22 III/IV 7073, 22/4 V 618.]

1-(2-Pyridylazo)-2-naphthol Upstream-Materialien And Downstream Produkte

1-(2-Pyridylazo)-2-naphthol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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