Melting point :-101.15°C (estimate)
Boiling point :116-119 °C752 mm Hg(lit.)
Density :0.871 g/mL at 25 °C(lit.)
FEMA :3407 | 2-METHYL-2-BUTENAL
refractive index :n20/D 1.448(lit.)
Flash point :65 °F
storage temp. :Flammables area
solubility :soluble in Chloroform
form :Liquid
color :Clear colorless to yellow
Odor :at 0.10?%?in?dipropylene glycol. strong green fruit
Water Solubility :Soluble in water
Sensitive :Air Sensitive
JECFA Number :1201
BRN :1698207
Stability :Air sensitive, Light Sensitive
LogP :1.065 (est)
CAS DataBase Reference :497-03-0(CAS DataBase Reference)
EPA Substance Registry System :trans-2-Methylcrotonaldehyde (497-03-0)

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 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. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. 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.