Physical And Chemical Properties Of Vanadium Pentoxide
Density: 3.357 g/cm3
Melting point: 690°C
Boiling point: 1750°C
Molecular weight: 182
Appearance: orange-yellow
Solubility: soluble in concentrated acid and alkali, slightly soluble in water, insoluble in anhydrous ethanol.
It evaporates significantly at temperatures above 700°C. It decomposes into oxygen and vanadium tetroxide at 700~1125°C, making it a catalyst for many organic and inorganic reactions. It is a strong oxidizing agent and can be easily reduced to a variety of inexpensive oxides. It is slightly soluble in water and readily forms a stable colloidal solution. It is highly soluble in alkali and forms vanadate (VO3-) under weak alkaline conditions. When dissolved in a strong acid (usually soluble at pH = 2), it does not form vanadate ions, but forms vanadium ions (VO2+). For toxic substances, the maximum permissible amount in the air is less than 0.5 mg/m3.
