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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

No data are available to evaluate the toxicity of the substance or its hydrolysis product to terrestrial organisms. A test towards terrestrial organisms should be proposed by the registrant, if the chemical safety assessment indicates the need to further investigate the effects on terrestrial organisms. Annex IX of Regulation 1907/2006 states that in the absence of toxicity data for terrestrial organisms, the equilibrium partitioning method (EPM) may be applied to assess the hazard to terrestrial organisms. The results of the chemical safety assessment indicate that potential exposure would not be expected to result in an unacceptable level of risk for the terrestrial compartment. Therefore, no specific testing is required to assess the toxicity of the substance to terrestrial macroorganisms.

Furthermore, there is no wide dispersive use as the chemical is only used in industrial processes. From industrial processes, the release of 4-MHHPA into the sewage is very limited, if not completely negligible, as the chemical is incorporated into a matrix during polymer manufacturing, In the unlikely case that 4-MHHPA will reach sewage, the anhydride group, which represents the single reactive and toxic functional moiety, rapidly hydrolyses to the respective di-acid. Overall, it is expected that 4-MHHPA will not be present in sewage sludge, will not be distributed to sediment, and direct or indirect exposures of the aquatic and terrestrial compartments are unlikely.