Melting point :-90°C
Boiling point :137-138 °C765 mm Hg(lit.)
Density :0.86 g/mL at 25 °C(lit.)
refractive index :n20/D 1.45(lit.)
Flash point :89 °F
Water Solubility :Slightly soluble in water
form :clear liquid
color :White to Yellow to Green
Odor :Powerful and diffusive, “gassy’’-green and slightly fruity odor of poor tenacity.
JECFA Number :1209
LogP :1.700 (est)
CAS DataBase Reference :14250-96-5(CAS DataBase Reference)
EPA Substance Registry System :2-Pentenal, 2-methyl-, (2E)- (14250-96-5)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning 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
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. P242 Use only non-sparking tools. P243 Take precautionary measures against static discharge. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection. 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. P332+P313 IF SKIN irritation occurs: Get medical advice/attention. P337+P313 IF eye irritation persists: Get medical advice/attention. P370+P378 In case of fire: Use … for extinction. P403+P235 Store in a well-ventilated place. Keep cool.