Evaluation Of Median Tolerance Limit ( Lc50 ) For A Fresh Water Fish Labeo Rohita Under The Stress Of Azodyes Metanil Yellow And Bismark Brown

Abstract

The present study is to  evaluate the LC50 value of a fresh water fish Labeo  rohita when exposed to azodyes Metanil yellow ( 4” Aniline azobenzene – m –sulfonic acid) and Bismark brown ( 2,4 – diamino 3” aminoazobenzene ). In case of metanil yellow the LC50 value at 96 hrs. Exposure was calculated to be 2.0414 Log mg/l and for bismark brown was calculated to be 2.000 Log mg/l at  96 hrs exposure.