Diarsenic tetraiodide

Diarsenic tetraiodide is an inorganic compound of arsenic and iodine. It is a dark red metastable solid. The compound is a closely related to the better characterized diphosphorus tetraiodide. Identified in the late 19th century with the (accurate) empirical formula AsI₂,^[1] the compound was assigned the formula (As₂I₄) several years later.^[2]

Diarsenic tetraiodide

Names
IUPAC name Arsenic diiodide
Identifiers
CAS Number	13770-56-4 Y
3D model (JSmol)	Interactive image
PubChem CID	165365657
CompTox Dashboard (EPA)	DTXSID401045877
InChI InChI=1S/As.2HI/h;2*1H/p-2 Key: YWEMTIDRPOANDU-UHFFFAOYSA-L
SMILES I[As](I)[As](I)I
Properties
Chemical formula	As2I4
Molar mass	657.461 g/mol
Appearance	Red crystalline solid
Melting point	137 °C (279 °F; 410 K)
Boiling point	380 °C (716 °F; 653 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references