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Abstract

The bioassay of eight dyes and dye-supporting chemicals was done using Mystus vittatus (Bloch) as the bioindicator shows LC50, 44.4 mg/L for Orange MLIRL, 55.5 mg/L for Green SG, 20 mg/L for Alizarine Blue OCR, 111.1 mg/L for Blue Bs, 222.2 mg/L for Brown GR, 55.5 mg/L for Chrome Navy, 50 mg/L for Sodium Bicromate and 50 mg/L for Potassium Chromate.Thus the toxicity is highest for Alizarine Blue OCR.