Abstract: Toxicity data for the 50% growth inhibitory concentration against Tetrahymena pyriformis (log (IGC50(-1))) for 42 alkyl- and halogen-substituted nitro- and dinitrobenzenes were obtained experimentally. Log (IGC50(-1)) along with the hydrophobicity, the logarithm of the 1-octanol/water partition coefficient (log Kow), and the molecular orbital properties, the ...