Dangerous Goods by Road
the approach for classification of aquatic environmental hazards is tiered, and is dependent upon the
type of information available for the mixture itself and for its ingredients. elements of the tiered
approach include:
(a) classification based on tested mixtures;
(b) classification based on bridging principles;
(c) the use of "summation of classified ingredients" and/or an "additivity formula".
figure 2.2.9.1.10.4.2 below outlines the process to be followed.
13 special guidance is provided in chapter 4.1, paragraph 4.1.2.13 and annex 9, section a9.6 of the ghs.
figure 2.2.9.1.10.4.2: tiered approach to classification of mixtures
