Melting point :−185 °C(lit.)
Boiling point :−47.7 °C(lit.)
Density :1.49
vapor density :1.48 (vs air)
vapor pressure :15.4 atm ( 37.7 °C)
refractive index :1.3567
Flash point :-108 °C
pka :43(at 25℃)
form :Colorless gas
Odor Threshold :13ppm
explosive limit :11.1%
Water Solubility :0.33g/L(25 ºC)
FreezingPoint :-185.25℃
Merck :13,7941
BRN :1696878
Dielectric constant :1.9（20℃）
Stability :Stable. Highly flammable. Readily forms explosive mixtures with air. Incompatible with strong oxidizing agents, strong acids, halogens.
LogP :1.77 at 20℃
CAS DataBase Reference :115-07-1(CAS DataBase Reference)
IARC :3 (Vol. Sup 7, 60) 1994
EPA Substance Registry System :Propylene (115-07-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H220 Extremely flammable gas Flammable gases Category 1 Danger P210, P377, P381, P403 H280 Contains gas under pressure; may explode if heated Gases under pressure Compressed gas Liquefied gas Dissolved gas Warning P410+P403
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely. P381 Eliminate all ignition sources if safe to do so. P410+P403 Protect from sunlight. Store in a well-ventilated place.