Melting point :−16 °C(lit.)
Boiling point :130.2 °C(lit.)
Density :2.15 g/mL at 25 °C(lit.)
vapor density :6.25
refractive index :1.6006 (589.3 nm 20℃)
Flash point :130.2°C
solubility :reacts with H2O; very soluble in chloroform,ctc, ethyl ether
form :Liquid
color :Colorless to yellow-brown
Water Solubility :Decomposes in water with formation of As(OH)₃ and HCl. Increasing dilutions in water result in As₂O₃ precipitation
Sensitive :Moisture Sensitive
Merck :14,801
Dielectric constant :12.4（21℃）
Stability :Stability Reacts with water. Corrodes many metals. Reacts violently on contact with potassium, sodium and aluminium.
CAS DataBase Reference :7784-34-1(CAS DataBase Reference)
EPA Substance Registry System :Arsenic(III) chloride (7784-34-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, 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:	P262 Do not get in eyes, on skin, or on clothing. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.