Melting point :-96 °C
Boiling point :75 °C(lit.)
Density :0.817
vapor density :2.5 (vs air)
vapor pressure :90 mm Hg ( 20 °C)
refractive index :n20/D 1.380(lit.)
FEMA :2219 | BUTYRALDEHYDE
Flash point :12 °F
storage temp. :2-8°C
solubility :water: soluble50g/L at 20°C
form :Liquid
color :Clear colorless
PH :6-7 (71g/l, H2O, 20℃)
Odor :Pungent aldehyde; pungent and intense.
PH Range :6-7
Odor Threshold :0.00067ppm
explosive limit :1.7-11.1%(V)
Odor Type :chocolate
Water Solubility :7.1 g/100 mL (25 ºC)
Sensitive :Air Sensitive
JECFA Number :86
Merck :14,1591
BRN :506061
Exposure limits :No exposure limit is set for n-butyraldehyde.
Dielectric constant :13.4（26℃）
Stability :Stable. Incompatible with oxidizing agents, strong bases, strong reducing agents, strong acids. Highly flammable.
LogP :1.3 at 20℃ and pH4.4-4.7
Surface tension :70mN/m at 1g/L and 20℃
CAS DataBase Reference :123-72-8(CAS DataBase Reference)
NIST Chemistry Reference :Butanal(123-72-8)
EPA Substance Registry System :Butyraldehyde (123-72-8)

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 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. 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. P337+P313 IF eye irritation persists: Get medical advice/attention. P370+P378 In case of fire: Use … for extinction.