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A study of this nucleus via the ²⁴Mg(³He, ⁸Li)¹⁹Na reaction at E(³He) = 76.3 MeV leads to an atomic mass excess of 12.929 ± 0.012 MeV for ¹⁹Na; it is then unstable with respect to breakup into ¹⁸Ne + p by 321 ± 13 keV. An excited state at E_x = 120 ± 10 keV is also reported (BE75L, WA85C). See also (AN85E, AN86U) and (AN83D, AU83C; theor.).