Hydrogen deuteride

Hydrogen deuteride

Names
IUPAC name Hydrogen deuteride
Systematic IUPAC name (2H)Dihydrogen[citation needed]
Identifiers
CAS Number	13983-20-5 Y
3D model (JSmol)	Interactive image
ChemSpider	146609 Y
ECHA InfoCard	100.034.325
EC Number	237-773-0
PubChem CID	167583
UN number	1049
CompTox Dashboard (EPA)	DTXSID001027186
InChI InChI=1S/H2/h1H/i1+1 Y Key: UFHFLCQGNIYNRP-OUBTZVSYSA-N Y InChI=1/H2/h1H/i1+1 Key: UFHFLCQGNIYNRP-OUBTZVSYED
SMILES [2H][H]
Properties
Chemical formula	HD
Molar mass	3.02204 g mol−1
Melting point	−259 °C (−434.2 °F; 14.1 K)
Boiling point	−253 °C (−423.4 °F; 20.1 K)
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220, H280
Precautionary statements	P210, P377, P381, P403, P410+P403
NFPA 704 (fire diamond)	0 4 0
Autoignition temperature	571 °C (1,060 °F; 844 K)
Related compounds
Related hydrogens	Deuterium Hydrogen Tritium
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Hydrogen deuteride is an isotopologue of dihydrogen composed of two isotopes of hydrogen: the majority isotope ¹H (protium) and ²H (deuterium). Its proper molecular formula is ¹H²H, but for simplification, it is usually written as HD.