Melting point :-87 °C (lit.)
Boiling point :42 °C (lit.)
Density :0.678 g/mL at 20 °C 0.683 g/mL at 25 °C (lit.)
vapor density :2.4 (vs air)
vapor pressure :6.56 psi ( 20 °C)
refractive index :n20/D 1.433(lit.)
Flash point :<−30 °F
storage temp. :2-8°C
form :clear liquid
color :Colorless to Almost colorless
Specific Gravity :0.6764
BRN :1523659
Dielectric constant :2.3199999999999998
Stability :Stable. Highly flammable. Readily forms explosive mixtures with air. Note low flash point. Incompatible with strong oxidizing agents.
CAS DataBase Reference :2004-70-8(CAS DataBase Reference)
EPA Substance Registry System :1,3-Pentadiene, (3E)- (2004-70-8)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 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 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P331 Do NOT induce vomiting.