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Specification: Purity≥98%-99.9%
Properties: Brown-black orthorhombic crystal. Relative density 5.22 (25℃).
Melting point 880℃. Boiling point 1230℃.Insoluble in water and dilute acid,
soluble in concentrated hydrochloric acid while decomposing.
Usage: Used as reagent and the catalyst of hydrocarbon polymerization etc