gas molecular entity dihydrogen 2.01588 2.016 An elemental molecule consisting of two hydrogens joined by a single bond. CAS:1333-74-0 CHEBI:13350 CHEBI:18276 CHEBI:25363 CHEBI:5785 E 949 E-949 E949 Gmelin:3 H2 H2 HMDB:HMDB0001362 Hydrogen InChI=1S/H2/h1H KEGG:C00282 MetaCyc:HYDROGEN-MOLECULE MolBase:748 PMID:15303745 PMID:16517646 PMID:18706888 PMID:19905000 PMID:19908827 PMID:20568549 PMID:24171421 Reaxys:3587189 UFHFLCQGNIYNRP-UHFFFAOYSA-N Wikipedia:Hydrogen [H][H] chebi_ontology dihydrogen molecular hydrogen elemental molecule elemental hydrogen