Arsine oxide is a compound of arsenic and oxygen that has several synonyms, such as arsenic trioxide, arsenolite, arsenious acid anhydride, and arsenic oxide. These synonyms are used interchangeably, depending on the context and the purpose of the discussion. Arsenic trioxide is the most commonly used synonym for arsine oxide, particularly in industrial applications such as manufacturing of glass, pigments, and textiles. Arsenolite is another synonym for arsine oxide, which is often used in mineralogy and geological surveys. Similarly, arsenious acid anhydride and arsenic oxide are commonly used in pharmacology and toxicology to describe the compound's chemical properties and potential health hazards.