Guidance Document on Aquatic Toxicity Testing of Difficult Substances and Mixtures
This document provides the second edition of Guidance Document 23 on Aqueous-Phase
Aquatic Toxicity Testing of Difficult Test Chemicals.
Whilst this guidance is targeted towards tests described by the OECD Test Guidelines
identified it may also be relevant to other tests. The guidance relates to the practical
aspects of carrying out valid tests with “difficult” test chemicals and mixtures and
presenting the results. The guidance is considered to reflect good practice but it
is important to recognise that some test chemicals and mixtures will present specific
scientific and technical issues that may fall outside its scope. This document is
divided into five substantive sections covering guidance for carrying out a preliminary
assessment of test chemical stability; general considerations on selection of exposure
systems; stock and test solution preparation and exposure systems; sampling of test
solution for analysis; and calculating and reporting test results.
Published on May 16, 2019
In series:OECD Series on Testing and Assessmentview more titles