This document provides the second edition of Guidance Document 23 on Aqueous-Phase Aquatic Toxicity Testing of Difficult Test Chemicals.

This document provides guidance for the testing of substances, and mixtures, classed as “difficult to test” for the purposes of determining their aquatic to

This document provides a description of a Harmonised System for the Classification of Chemicals which are Hazardous for the Aquatic Environment and guidance to

This review documents examines member country classification of substances and mixtures which in contact with water release toxic gases.

This detailed review documents examines member country classification of substances and mixtures which cause respiratorytract irritation and corrosion.