Melting point :-80.15°C
Boiling point :146 °C(lit.)
Density :0.893 g/mL at 25 °C(lit.)
vapor density :4.1 (vs air)
vapor pressure :4.6 mm Hg ( 20 °C)
refractive index :n20/D 1.49(lit.)
Flash point :101 °F
storage temp. :Flammables area
solubility :Chloroform (Slightly), Hexanes (Slightly)
form :Liquid
color :Colorless to Almost colorless
explosive limit :~6.4%
Water Solubility :Soluble in water (0.01% at 20C).
Exposure limits :ACGIH: TWA 2 ppm; STEL 4 ppm
NIOSH: Ceiling 5 ppm(25 mg/m3) Stability :Volatile
LogP :3.82 at 20℃
CAS DataBase Reference :16219-75-3(CAS DataBase Reference)
EPA Substance Registry System :5-Ethylidene-2-norbornene (16219-75-3)

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 H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312 H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273 Avoid release to the environment. P302+P352 IF ON SKIN: wash with plenty of soap and water. P314 Get medical advice/attention if you feel unwell.