Download or read book OECD Guidelines for the Testing of Chemicals, Section 2 Test No. 203: Fish, Acute Toxicity Test written by OECD and published by OECD Publishing. This book was released on 2019-06-18 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fish are exposed to the test substance preferably for a period of 96 hours. Mortalities are recorded at 24, 48, 72 and 96 hours and the concentrations which kill 50 per cent of the fish (LC50) are determined where possible. One or more species ...