AsO2

AsO2, also known as arsenious oxide or arsenic trioxide, is an inorganic compound with the chemical formula As2O3. It is a white, crystalline solid that is odorless and tasteless. AsO2 occurs naturally in the environment as the mineral claudetite. It can be produced industrially as a byproduct of smelting copper and lead ores, or by the combustion of arsenic-containing materials.

The compound is highly toxic and has been used historically in various applications, including as a poison, a pesticide, and in the manufacture of glass and enamels. Due to its toxicity, its use has been significantly restricted in many parts of the world. Despite its hazardous nature, AsO2 has found a niche in modern medicine. It is used as a treatment for certain types of leukemia, specifically acute promyelocytic leukemia (APL). This therapeutic use is carefully controlled and administered under strict medical supervision.

AsO2 reacts with water to form arsenious acid. It is soluble in strong acids and alkalis. Its chemical properties make it a versatile reagent in certain industrial processes, though its hazardous nature necessitates stringent safety protocols during handling and disposal. The environmental impact of arsenic compounds is a significant concern, and regulations are in place to limit their release into the environment.