ChemicalBook > CAS DataBase List > 1-(2-Pyridylazo)-2-naphthol

1-(2-Pyridylazo)-2-naphthol

Uses

CAS No.85-85-8
Chemical Name:1-(2-Pyridylazo)-2-naphthol
CBNumber:CB0322603
Molecular Formula:C15H11N3O
Formula Weight:249.27
MOL File:85-85-8.mol

1-(2-Pyridylazo)-2-naphthol Property

Melting point 138-141 °C (lit.)
Boiling point 392.37°C (rough estimate)
Density 1.1469 (rough estimate)
bulk density 190kg/m3
refractive index 1.5700 (estimate)
storage temp. Store at +5°C to +30°C.
solubility Practically insoluble[in water]
form Powder/Solid
pka 8.86±0.50(Predicted)
color green to red, upon chelation with metal
Water Solubility Insoluble
λmax 461-465 nm in ethanol
ε(extinction coefficient) ≥15000 at 462-468nm in methanol at 0.01g/L
>35,000 at 222-228nm in methanol at 0.01g/L
>9,000 at 300-306nm in methanol at 0.01g/L
BRN 206390
Stability Stable. Incompatible with strong oxidizing agents, strong bases.
CAS DataBase Reference 85-85-8(CAS DataBase Reference)
FDA UNII 095B53Y3XV
NIST Chemistry Reference 2-Naphthalenol, 1-(2-pyridinylazo)-(85-85-8)
EPA Substance Registry System 2-Naphthalenol, 1-(2-pyridinylazo)- (85-85-8)
UNSPSC Code 12352104
NACRES NB.21

Safety

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

NFPA 704:

	1
2		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H315-H319-H335
Precautionary statements P261-P280a-P304+P340-P305+P351+P338-P405-P501a-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313

1-(2-Pyridylazo)-2-naphthol Price More Price(12)

Brand: Sigma-Aldrich(India)
Product number: 101036
Product name : 1-(2-Pyridylazo)-2-naphthol
Purity: indicator grade
Packaging: 5G
Price: ₹9017.23
Updated: 2022/06/14
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Brand: Sigma-Aldrich(India)
Product number: 101036
Product name : 1-(2-Pyridylazo)-2-naphthol
Purity: indicator grade
Packaging: 25G
Price: ₹30288.35
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 1.07531
Product name : 1-(2-Pyridylazo)-2-naphthol (PAN)
Purity: metal indicator Reag. Ph Eur
Packaging: 5G
Price: ₹16590
Updated: 2022/06/14
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Brand: ALFA India
Product number: ALF-A17475-14
Product name : 1-(2-Pyridylazo)-2-naphthol, 98%
Purity:
Packaging: 25g
Price: ₹22392
Updated: 2022/05/26
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Brand: ALFA India
Product number: ALF-A17475-06
Product name : 1-(2-Pyridylazo)-2-naphthol, 98%
Purity:
Packaging: 5g
Price: ₹5858
Updated: 2022/05/26
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1-(2-Pyridylazo)-2-naphthol Chemical Properties,Usage,Production

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.
Definition ChEBI: 1-(2-pyridin-2-yldiazenyl)-2-naphthol is a member of naphthols.
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.]