Boiling point :71-72 °C/18 mmHg (lit.)
Density :1.479 g/mL at 25 °C (lit.)
refractive index :n20/D 1.616(lit.)
Flash point :158 °F
form :liquid
pka :4.73±0.70(Predicted)
color :gold-yellow
Water Solubility :Not miscible or difficult to mix in water.
Sensitive :Air Sensitive
BRN :385715
Exposure limits :ACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 CAS DataBase Reference :645-96-5(CAS DataBase Reference)
EPA Substance Registry System :Benzeneselenol (645-96-5)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, 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:	P273 Avoid release to the environment. P314 Get medical advice/attention if you feel unwell.