Melting point :-254.43° (18.73 K) at 128.5 mm (triple point)
Boiling point :-249.5 °C(lit.)
Density :0.169 g/mL at 25 °C(lit.)
vapor density :0.07 (vs air)
vapor pressure :17.1-1665kPa at -254.43--234.8℃
form :gas
color :colorless
Thermal Conductivity :0.14 W/(m·K)
Merck :13,2956
Henry's Law Constant :7.9×10^-6 mol/(m³Pa) at 25℃, Muccitelli and Wen (1978)
Dielectric constant :1.3（20℃）
Stability :Stable. Extremely flammable. Readily forms explosive mixtures with air.
InChI :InChI=1S/H2/h1H/i1+1D
InChIKey :UFHFLCQGNIYNRP-VVKOMZTBSA-N
SMILES :[2H][2H]
CAS DataBase Reference :7782-39-0(CAS DataBase Reference)
EPA Substance Registry System :Deuterium (7782-39-0)
CAS Number Unlabeled :1333-74-0

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
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. P403 Store in a well-ventilated place.