1,4-Dihydrazinophthalazine hydrogen sulfate 1,4-Dihydrazinophthalazine sulfate 7327-87-9 CCRIS 5386 Depressan Dihydralazine sulfate Dihydralazine sulphate EINECS 230-808-0 Hydralazine sulfate Phthalazine, 1,4-dihydrazino-, sulfate (1:1) Sulfate de dihydralazine [French]