1-(2′-Pyridylazo)-2-naphthol
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1-(2′-Pyridylazo)-2-naphthol
structure -
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CAS No:
85-85-8
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Formula:
C15H11N3O
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Chemical Name:
1-(2′-Pyridylazo)-2-naphthol
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Synonyms:
2-Naphthalenol,1-[2-(2-pyridinyl)diazenyl]-;2-Naphthol,1-(2-pyridylazo)-;2-Naphthalenol,1-(2-pyridinylazo)-;Pyridine,2-(2-hydroxy-1-naphthylazo)-;1-[2-(2-Pyridinyl)diazenyl]-2-naphthalenol;2-Hydroxy-1-(2-pyridylazo)naphthalene;1-(2-Pyridylazo)-2-hydroxynaphthalene;1-(2-Pyridylazo)-2-naphthol;PAN (indicator);PAN;1-(Pyridin-2-azo)-2-naphthol;1-(2-pyridylazo)naphthol-2;1-(2′-Pyridylazo)-2-naphthol;NSC 5332;2-Hydroxy-1-[pyridin-2-yldiazenyl]naphthalene;PAN 1
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CAS No:
1-(2′-Pyridylazo)-2-naphthol Basic Attributes
249.27
249.27
206390
201-637-9
095B53Y3XV
5332
DTXSID5058933
29333999
Characteristics
57.84000
2.74
green to red, upon chelation with metal Powder/Solid
1.2±0.1 g/cm3
137 °C
469.6±25.0 °C at 760 mmHg
237.8±23.2 °C
1.662
H2O: Insoluble
-20°C
Safety Information
NONH for all modes of transport
3
36/37/38
26-36-37/39
Xi
Stable. Incompatible with strong oxidizing agents, strong bases.
|Warning|H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 48 companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
1-(2′-Pyridylazo)-2-naphthol Use and Manufacturing
It is obtained by coupling 2-aminopyridine with 2-naphthol after diazotization. Anhydrous ethanol is reacted with sodium metal to generate sodium ethoxide, then an ethanol solution of 2-aminopyridine is added, and ethyl nitrite vapor is passed through to react at 45-50°C. After that, keep for 8 hours, filter out the diazonium salt and wash with ether. The diazonium salt is added to the ethanol solution of 2-naphthol, carbon dioxide is introduced at 45-50°C for coupling reaction, the crystals are filtered after 6 hours, washed with distilled water, recrystallized with ethanol, and dried to obtain the finished product.
This product is a complex index agent.
2-Naphthalenol, 1-[2-(2-pyridinyl)diazenyl]-: ACTIVE
Computed Properties
Molecular Weight:249.27
XLogP3:3.9
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:4
Rotatable Bond Count:2
Exact Mass:249.090211983
Monoisotopic Mass:249.090211983
Topological Polar Surface Area:57.8
Heavy Atom Count:19
Complexity:321
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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