酞嗪又称苯并-正二嗪或苯并哒嗪，是一种分子式为C8H6N2的杂环有机化合物。它与其他萘啶类异构体，包括喹喔啉、辛可林和喹唑啉等。
2-(p-Tolyl)phthalazin-1(2H)-one
4-Chloro-N,N-diethylphthalazin-1-amine
6-(Diethylamino)-2,3-dihydrophthalazine-1,4-dione
6-(Dimethylamino)-2,3-dihydrophthalazine-1,4-dione
1-(2-Benzylidenehydrazinyl)phthalazine
1,4-Dihydrazinylphthalazine
3-Methyl-4-oxo-3,4-dihydro-phthalazine-1-carboxylic acid
3-Methyl-4-oxo-3,4-dihydrophthalazine-1-carbohydrazide
6-Nitro-2,3-dihydrophthalazine-1,4-dione
1-Chloro-4-(3,4-dimethylphenyl)phthalazine
1-Chloro-4-(p-tolyl)phthalazine
4-Methylphthalazine-1-thiol
4-(4-Methoxyphenyl)phthalazin-1(2H)-one
3-Ethyl-4-oxo-3,4-dihydrophthalazine-1-carboxylic acid
3-Ethyl-4-oxo-3,4-dihydrophthalazine-1-carboxamide
Methyl 3-ethyl-4-oxo-3,4-dihydrophthalazine-1-carboxylate
Methyl 3-oxo-4-(1-oxophthalazin-2(1H)-yl)butanoate
2-(4-Bromophenyl)phthalazin-1(2H)-one
2-(4-Methyl-1-oxophthalazin-2(1H)-yl)propanoic acid
1-Hydrazinyl-4-phenylphthalazine
1-Chloro-7-(trifluoromethyl)phthalazine
