5-NITROPHTHALIC ACID, RARECHEM AL BO 1138, 4-nitrobenzene-1,2-bicarboxylic acid, 4-nitro-1,2-dicarboxylic acid, 4-Nitro-phthalsaeure, 4-nitro-phthalate, 4-nitro-phthalic acid, p-Nitro Phthalic Acid, 4-NPA, 1,2-Benzenedicarboxylic acid, 4-nitro-, 4 NITRO PHTHALLIC ACID