Melting point :-67.38°C (estimate)
Boiling point :90-92 °C (lit.)
Density :0.806 g/mL at 20 °C 0.804 g/mL at 25 °C (lit.)
FEMA :2691 | 2-METHYLBUTYRALDEHYDE
refractive index :n20/D 1.3919(lit.)
Flash point :40 °F
storage temp. :2-8°C
solubility :soluble in Chloroform, Methanol
form :Liquid
color :Clear colorless
Odor :at 1.00 % in dipropylene glycol. musty cocoa phenolic coffee nutty malty fermented fatty alcoholic
Odor Type :cocoa
explosive limit :1.3-13%(V)
Water Solubility :Soluble in water, ether, and alcohol.
Sensitive :Air Sensitive
JECFA Number :254
BRN :1633540
LogP :1.23 at 25℃
CAS DataBase Reference :96-17-3(CAS DataBase Reference)
NIST Chemistry Reference :Butanal, 2-methyl-(96-17-3)
EPA Substance Registry System :2-Methylbutanal (96-17-3)

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 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 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 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. P233 Keep container tightly closed. P273 Avoid release to the environment. 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.