Appearance Yellow to Yellow-Green to Tan powder
Infrared spectrometry Conforms to Structure
Purity(HPLC) ≥98.0%
Melting point 285°C - 289°C
Wavelength 344 - 352 nm
In 0.1 N NaOH
Extinction Coefficient ≥8000
Wavelength 278 - 286 nm
Extinction Coefficient ≥22000
Wavelength 259 - 267 nm
Extinction Coefficient ≥20000
Wavelength 220 - 228 nm
Extinction Coefficient ≥27000
solubility in Pyridine Yellow to Amber，Clear to Slightly Hazy ，c = 50 mg/ml, Pyridine
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