Molecular formula :
nature : water re-crystallization, including members of crystalline water. The temperature of 91.5 ° C (102 ° C). Recrystallization with benzene, non-crystalline water, melting point 98 ~ 100 ° C (117 ° C). 360 ° C above the boiling point. Soluble ethanol, benzene, acetone, petroleum ether insoluble. With iron, copper, cobalt, nickel and 2,2 '- bipyridine complexes formed with the red Fe2 + complexes formed with potassium permanganate oxidation in 2,2' - pyridyl -3,3 '- dicarboxylic acid. Can be used as copper, iron quantitative colorimetric reagents, and could serve as sulfuric acid titration molysite Cerium the indicator; Also used for animal fibers dye.
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