1-(2-Pyridylazo)-2-naphthol Seven Chongqing Chemdad Co. ，Ltd

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1-(2-Pyridylazo)-2-naphthol

CAS No.：85-85-8

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1-(2-Pyridylazo)-2-naphthol Basic information

Product Name:	1-(2-Pyridylazo)-2-naphthol
Synonyms:	1-(2-pyridinylazo)-2-naphthaleno;1-(2-Pyridylazo)-2-Hydroxynaphthalene;O-PAN;1-(2-Pyridylazo)-2-n;1-(2-Pyridylazo)-2-naphthol 99%;1-[(E)-2-Pyridinyldiazenyl]-2-naphthol;2-Hydroxy-1-(2-pyridylazo)naphthalene;2-Naphthol, 1-(2-pyridylazo)-
CAS:	85-85-8
MF:	C15H11N3O
MW:	249.27
EINECS:	201-637-9
Product Categories:	Pyridylazo Compounds;Analytical Chemistry;Azo Compounds;Chelating Reagents;Naphthylazo Compounds;Intermediates
Mol File:	85-85-8.mol

1-(2-Pyridylazo)-2-naphthol Chemical Properties

Melting point	138-141 °C (lit.)
Boiling point	392.37°C (rough estimate)
density	1.1469 (rough estimate)
refractive index	1.5700 (estimate)
storage temp.	Store at +5°C to +30°C.
pka	8.86±0.50(Predicted)
form	Powder/Solid
color	green to red, upon chelation with metal
Water Solubility	Insoluble
BRN	206390
Stability:	Stable. Incompatible with strong oxidizing agents, strong bases.
CAS DataBase Reference	85-85-8(CAS DataBase Reference)
NIST Chemistry Reference	2-Naphthalenol, 1-(2-pyridinylazo)-(85-85-8)
EPA Substance Registry System	2-Naphthalenol, 1-(2-pyridinylazo)- (85-85-8)

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36-37/39
WGK Germany	3
TSCA	Yes
HS Code	29333999

MSDS Information

Provider	Language
1-(2-Pyridylazo)-2-naphthol	English
SigmaAldrich	English
ACROS	English
ALFA	English

1-(2-Pyridylazo)-2-naphthol Usage And Synthesis

Uses	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.
Chemical Properties	orange crystals
Uses	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.
General Description	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.
Agricultural Uses	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 .
Purification Methods	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 Preparation Products And Raw materials

Raw materials	CARBON DIOXIDE-->Sodium cyanide-->Cyclohexane-->2-Aminopyridine-->Ethyl nitrite-->3-(2,2-Dichlorovinyl)-2,2-dimethylcyclopropanecarbonyl chloride
Preparation Products	CARAMEL-->polyaniline composite film

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