Cas No. 85-85-8
Molecular formula C15H11N3O
Molecular weight 249.27
Alias ​​1- (2-pyridylazo) -2-naphthol (PAN) 1- (2-Pyridylazo) -2-naphthol
Orange-red crystalline powder. Insoluble in water, soluble in organic solvents such as methanol, ethanol, benzene, ether, chloroform and hot dilute lye. It forms red or other color complexes with most metal ions. The complexes are insoluble in water.
Melting point: 138-141 ° C
(AR)
Appearance Orange to reddish brown powder Infrared spectrometry and Infrared spectrometry to match the reference point Melting point 138 ° C-143 ° C
Purity≥98.0% (non-aqueous titration)
Solubility in Methanol solution Sulfated ash <0.3%
Absorbance ≥ 0.600 (10mg / L, methanol, 463.0-467.0 nm)
Sensitivity test passed
Product use metal indicator and spectrum analysis reagent for transition metals.
It is specifically used as a colorimetric agent for the determination of Al3 +, Sb3 +, Cd2 +, Zn2 +, Co2 +, Cu2 +, Ga3 +, In3 +, Fe3 +, Pd 2+ and other metal ions by photometry, extraction photometry or fluorescence photometry. It is also used as a metal indicator for the determination of Bi3 +, Ga3 +, In3 +, Ni2 +, Cu2 +, Ce3 +, etc. by EDTA co-titration. Trace metals such as zinc and lead.
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