The arsonium cation is a positively charged polyatomic ion with the chemical formula AsH+
4. An arsonium salt is a salt containing either the arsonium (AsH+
4) cation, such as arsonium bromide (AsH+
) and arsonium iodide (AsH+
), which can be synthesized by reacting arsine with hydrogen bromide or hydrogen iodide.. Or more commonly, as organic derivative such as the quaternary arsonium salts Ph
(CAS: [123334-18-9], hydrate form) and the zwitterionic compound arsenobetaine.
|Systematic IUPAC name
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||g·mol−1 78.954|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).