1-(2-Pyridylazo)-2-naphthol

1-(2-Pyridylazo)-2-naphthol Basic information
Uses
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 Structure
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.
pka8.86±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 Reference85-85-8(CAS DataBase Reference)
NIST Chemistry Reference2-Naphthalenol, 1-(2-pyridinylazo)-(85-85-8)
EPA Substance Registry System2-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
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1-(2-Pyridylazo)-2-naphthol Usage And Synthesis
Uses1-(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 Propertiesorange crystals
Uses1-(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.
DefinitionChEBI: 1-(2-pyridin-2-yldiazenyl)-2-naphthol is a member of naphthols.
General Description1-(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 Uses1-(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 MethodsPurify 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 materialsCARBON DIOXIDE-->Sodium cyanide-->Cyclohexane-->2-Aminopyridine-->Ethyl nitrite-->3-(2,2-Dichlorovinyl)-2,2-dimethylcyclopropanecarbonyl chloride
Preparation ProductsCARAMEL-->polyaniline composite film
1-(2-pyridylazo)-2-naphthol-6-sulfonic acid 1-Naphthol 1-(2-Pyridylazo)-2-naphthol 1,1'-Bi-2-naphthol ANTI-ACTIN, PAN MUSCLE, HUMAN Sodium acetate ANTI-TCR PAN ALPHA/BETA,ANTI-T-CELL RECEPTOR PAN ALPHA, BETA ANTI-TCR PAN ALPHA/BETA PHYCOERYTHRIN CONJUGATE ANTI-PIG TISSUE (PAN) 1-(3-pyridylazo)-2-naphthol 1-(5-bromo-2-pyridylazo)-2-naphthol-6-sulfonic acid ANTI-SODIUM CHANNEL, VOLTAGE GATED, PAN ANTI-T-CELLS (PAN) (RAT),ANTI-RAT PAN T CELLS MONOCLONAL ANTIBODY,ANTI-RAT PAN-T CELLS 2,6-Lutidine 2-Hydroxypyridine Phenmedipham 2-Naphthol Terbinafine Hydrochloride

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