has role independent continuant water An oxygen hydride consisting of an oxygen atom that is covalently bonded to two hydrogen atoms 0 XLYOFNOQVPJJNP-UHFFFAOYSA-N H2O 18.01530 InChI=1S/H2O/h1H2 18.01056 [H]O[H] hydroxide oxonium oxygen hydride mononuclear parent hydride amphiprotic solvent inorganic hydroxy compound mouse metabolite Saccharomyces cerevisiae metabolite greenhouse gas Escherichia coli metabolite human metabolite