1,2-Dihydro-3,6-pyridazinedione choline salt 2-Hydroxy-N,N,N-trimethylethanaminium salt with 1,2-dihydro-3,6-pyridazinedione (1:1) 61167-10-0 Ethanaminium, 2-hydroxy-N,N,N-trimethyl-, salt with 1,2-dihydro-3,6-pyridazinedione (1:1) Maleic hydrazide choline salt