In the title compound, C3H8O3N+. NO3-.C3H7O3N, the serinium and the serine
as zwitterion are held together by a strong O-H . . .O hydrogen bond. The s
erinium cation has a gauche I conformation and the serine molecule has a ga
uche II conformation for the hydroxyl O atom. The nitrate anion links the a
mino N atom of molecule 1 extending in a chain running along the a axis.