... . In Metallurgy industry: as precipitating and separating function for Rare-earth metal.2. In pharmaceutical industry: used ... Phenobarbital, and Borneol, etc.3. In Light industry: polishing for Marble, rust-remover, bleaching, dirt-remover, leather-processing, wood ... industry, as bleaching agent for textile, substitute for Acetic acid, as coloring mordant for fast pigment dyestuff.5. In organic ...