Registration Dossier
Registration Dossier
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EC number: 212-485-8 | CAS number: 822-06-0
Endpoint summary
Administrative data
Description of key information
Additional information
Summary and discussion
The inherent property of HDI is to hydrolyse rapidly in an aquatic environment. Depending on the use of a solvent or not, the size of the drops when direct weight is used, and the speed of a magnetic stirrer or of ultrasonic if used, determine the quantitative proportion of the hydrolysis products HDA and polyurea. The problem with tests on HDI is the inhomogeneous distribution of the substance in the test medium water because of formation of droplets. With these droplets a “real” concentration of HDI in water is neither analytically determinable nor can a reproducible and thus reliable exposure concentration for test organisms be fixed. The pure substance HDI, as it is in the droplets, showed to be lethal to the aquatic species. The following table shows the summary of the relevant ecotoxicological studies.
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