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Appearance very dark red powder; Assay (dye content)
95%; Assay (TLC) confirms; Boiling point 638.8°C; BSC certification ACRO-13;
Color index 26125; Density at peak 0.584au; Density 1.2; Elemental analysis
(carbon) 74.44%, (nitrogen) 13.8%; Flash point 323°C; Identification (IR)
conforms to structure; Identification (TLC) passes test staining; Loss on
drying 1.0%; Melting point 120°C; Refraction index 1.631; Solubility
(chloroform/ethanol) 1mg/mL 1:1; Solubility in water slightly; Suitability
certified for use as a fat stain in Churukian's modification of the method of
Lillie and Asburn (stains lipids, muscle fibers and alveolar macrophages) in
frozen sections; UV Ratios peak (ratio 0.99 at 506/536nm) 521nm; UV-VIS
spectra (0.01g/L, toluene) E357=15,900, (0.01g/L, toluene) E521=26,800;
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