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Description of key information

Due to its high adsorption and low toxicity to aquatic organisms, HEBMP was assigned to soil hazard category 3.

Testing for toxicity to terrestrial organisms is required by ECHA and has been commissioned with two representing two taxonomic groups and two trophic levels (decomposers and consumers): earthworms (OECD 222) and soil microorganisms (OECD 216). The study reports are expected to be available in time for the ECHA decision deadline of 13th December 2021 and the results from these studies will be used in due course to derive a new PNECsoil value for the chemical safety assessment.

Additional information

All members of the HEBMP category ionise to a defined anionic species at a given pH in aqueous solution relevant to human and environmental exposure. Hence some properties (measured or expressed in aqueous media, e.g. ecotoxicity) for a salt can be directly read across (with suitable mass correction) to the parent acid and vice versa. The terrestrial environment is exposed to HEBMP predominantly via application of WWTP sludge, and as such this phenomenon also directly affects soil in the receiving environment. At a specific pH, the degree of ionisation is the same regardless of whether the starting material was HEBMP-H or HEBMP(1-3Na).