1,3-Benzenedicarboxylic acid, dihydrazide 1,3-Phenylenebiscarbohydrazide 2760-98-7 86240-61-1 EINECS 220-425-7 Isophthalic acid dihydrazide Isophthalic acid hydrazide Isophthalic acid, dihydrazide (8CI) Isophthalic dihydrazide Isophthalic hydrazide Isophthalohydrazide Isophthalyl dihydrazide NSC 75606