Arsenic is a chemical element that has the symbol As and atomic number 33.

[2] The compound exists as colourless deliquescent crystals that fume in moist air.

Most metal bromide compounds are water soluble for uses in water treatment, chemical analysis and in ultra high purity for certain crystal growth applications.

AsBr3 is the parent for a series of hypervalent anionic bromoarsenates including [As2Br8]2−, [As2Br9]3−, and [As3Br12]3−.

[citation needed] Arsenic tribromide is highly toxic.