Melting point :-82.2 °C
Boiling point :155-157 °C (lit.)
Density :1.987 g/mL at 25 °C (lit.)
refractive index :n20/D 1.6388(lit.)
Flash point :140 °F
storage temp. :0-6°C
form :liquid
color :Light yellow to Brown
Water Solubility :Reacts with water.
Sensitive :Air & Moisture Sensitive
Exposure limits :ACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 Stability :Stable. Combustible. Incompatible with strong oxidizing agents, strong acids.
CAS DataBase Reference :7101-31-7(CAS DataBase Reference)
NIST Chemistry Reference :Dimethyl diselenide(7101-31-7)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning 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:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P273 Avoid release to the environment. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P314 Get medical advice/attention if you feel unwell.