Melting point :146 °C
Boiling point :403 °C
Density :4.69 g/mL at 25 °C(lit.)
Flash point :424°C
solubility :slightly soluble in H2O, ethanol, ethyl ether; soluble in benzene. toluene
form :Powder
Specific Gravity :4.39
color :red
Water Solubility :Soluble in alcohol, ether, Carbon disulfide, water(6 g/100 m).
Sensitive :Moisture Sensitive
Merck :14,803
Exposure limits :ACGIH: TWA 0.01 mg/m3
NIOSH: IDLH 5 mg/m3; Ceiling 0.002 mg/m3 Dielectric constant :7.0（150℃）
CAS DataBase Reference :7784-45-4(CAS DataBase Reference)
EPA Substance Registry System :Arsenous triiodide (7784-45-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,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:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P311 Call a POISON CENTER or doctor/physician. P405 Store locked up. P501 Dispose of contents/container to..…