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Test(s) 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 organisms.

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