Royal MH, 1,2-dihydro-pyridazine-3,6-dione,dipotassium salt, 1,2-Dihydro-3,6-pyridazinedione monopotassium salt, EINECS 249-000-4, 3,6-Pyridazinedione,1,2-dihydro-,monopotassium salt, Potassium maleic hydrazide, 1,2-Dihydropyridazine-3,6-dione,monopotassium salt, Potassium 1,2-dihydro-3,6-pyridazinedione, Maleic hydrazide potassium salt