Properties: Orthorhombic, orange needles by sublimation or from abs alc. Solvated scales from dil alc or by evaporation from ether. Sublimes at 110° (2 mm Hg). mp 290°. bp 430°. Absorption spectrum: Moir, J. Chem. Soc.
1927, 1810. Soly in water at 18°: 2.1´10-6 mols/l; at 25°: 2.5´10-6 mols/l. Sol in 300 parts boiling water; moderately sol in alcohol, freely in hot methanol and in ether at 25°. Also sol in benzene, toluene, xylene, pyridine, carbon disulfide, glacial acetic acid. Sol in water solns of alkalies with blue color, but without fluorescence. Fluorescent solns indicate unchanged 2-anthraquinone sodium sulfonate.
Melting point: mp 290°
Boiling point: bp 430°
Derivative Type: 1-Methyl ether
Percent Composition: C 70.86%, H 3.96%, O 25.17%
Properties: Orange needles with 1H2O from dil methanol. When dried at 100° mp 179°.
Melting point: mp 179°
Derivative Type: 2-Methyl ether
Percent Composition: C 70.86%, H 3.96%, O 25.17%
Properties: Orange needles from alcohol, mp 231°.
Melting point: mp 231°
Derivative Type: Dimethyl ether
Percent Composition: C 71.64%, H 4.51%, O 23.86%
Properties: Golden-yellow needles from alcohol, mp 215°.
Melting point: mp 215°
Use: In the manufacture of acid and chrome dyes for wool; acid-base indicator (in 0.5% alcoholic soln; pH: yellow 5.5, red 6.8); in spot tests as reagent for aluminum, indium, mercury, zinc, and zirconium; biological stain.
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