Melting point :−109 °C(lit.)
Boiling point :−4.5 °C(lit.)
Density :0.62 g/mL at 20 °C(lit.)
vapor density :1.9 (15 °C, vs air)
vapor pressure :1863 mm Hg ( 21 °C)
refractive index :1.4292
Flash point :−105 °F
storage temp. :0-6°C
solubility :water: soluble0.5g/L at 20°C
form :Colorless gas
color :Colorless to Almost colorless
explosive limit :12%
Odor Threshold :0.23ppm
Water Solubility :735mg/L(25 ºC)
FreezingPoint :-108.91℃
Merck :14,1509
BRN :605258
Henry's Law Constant :(x 10^-2 atm?m³/mol): 6.3 at 25 °C (Hine and Mookerjee, 1975)
Exposure limits :TLV-TWA 10 ppm (～22 mg/m³) (ACGIH), 1000 ppm (OSHA and NIOSH); IDLH 20,000 ppm (NIOSH); A2–Suspected Human Carcinogen (ACGIH).
Stability :Stable. Extremely flammable. May form explosive mixtures with air. Incompatible with strong oxidizing agents, copper, copper alloys. May contain stabilizer.
InChIKey :KAKZBPTYRLMSJV-UHFFFAOYSA-N
LogP :1.99 at 20℃
CAS DataBase Reference :106-99-0(CAS DataBase Reference)
IARC :1 (Vol. Sup 7, 54, 71, 97, 100F) 2012
EPA Substance Registry System :1,3-Butadiene (106-99-0)

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 H340 May cause genetic defects Germ cell mutagenicity Category 1A, 1B Danger
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P280 Wear protective gloves/protective clothing/eye protection/face protection. P308+P313 IF exposed or concerned: Get medical advice/attention. P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely. P410+P403 Protect from sunlight. Store in a well-ventilated place.