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Evaluation of acute toxicity of phenol and its chloro and nitro derivatives to certain teleosts


, : Evaluation of acute toxicity of phenol and its chloro and nitro derivatives to certain teleosts. Water Air & Soil Pollution 14: 95-102

Acute toxicity bioassays were conducted to evaluate comparative toxicity of phenol (an aromatic hydrocarbon), pentachlorphenol (chloro-derivative of phenol) and dinitrophenyl (nitro-derivative of phenol) for determining LC50 and acute toxicity range for 24, 48, 72 and 96 h, against test fish Notopterus notopterus, Colisa fasciatus and Saccobranchus fossilis. Relative susceptibility of fish, safe concentrations, heterogeneity factors and fiducial limits (95%) were calculated using 96 h LC50 values. Regression equations and slope functions (s) were calculated for each time interval. On the basis of relative susceptibility for phenol, N. notopterus was more susceptible compared to S. fossilis and the susceptibility of C. fasciatus was between the 2. In case of pentachlorophenol and dinitrophenol, susceptibility was in increasing order from C. fasciatus, S. fossilis and N. notopterus.

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