Under the 2005 revisions of IUPAC nomenclature of inorganic chemistry, there is no single correct name for every compound. The primary function of chemical nomenclature is to ensure that each name refers, unambiguously, to a single substance. It is considered less important to ensure that each substance should have a single unambiguous name, although the number of acceptable names is limited. "Water" is one acceptable name for this compound, even though it is neither a systematic nor an international name and is specific to just one phase of the compound (its liquid form). The other IUPAC recommendation is "oxidane."