Arsenic sulfide may refer to:
Arsenic trisulfide, As2S3, the mineral orpiment Arsenic pentasulfide, As2S5, similar structure to phosphorus pentasulfide (β-P2S5) Tetraarsenic tetrasulfide, As4S4 (2 isomers): the mineral realgar the mineral pararealgar Tetraarsenic trisulfide, As4S3, the mineral α- or β- dimorphite