Melting point :360°C
Density :4,75 g/cm³
solubility :insoluble in H2O; soluble in alkaline solutions
form :crystal
Specific Gravity :4.75
color :black
Water Solubility :Soluble in nitric acid. Insoluble in water.
Merck :14,805
Exposure limits :ACGIH: TWA 0.01 mg/m3; TWA 0.2 mg/m3
NIOSH: IDLH 5 mg/m3; IDLH 1 mg/m3; TWA 0.2 mg/m3; Ceiling 0.002 mg/m3 CAS DataBase Reference :1303-36-2(CAS DataBase Reference)
EPA Substance Registry System :Arsenic selenide (As2Se3) (1303-36-2)

Symbol(GHS):
Signal word:
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501 H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P284 Wear respiratory protection. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P320 Specific treatment is urgent (see … on this label). P405 Store locked up.