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Ecotoxicological information

Toxicity to terrestrial plants

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Key value for chemical safety assessment

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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 plants.

Furthermore, there is no wide dispersive use as the chemical is only used in industrial processes. From industrial processes, in the unlikely case that tetrahydrophthalic anhydride (THPA) 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 THPA will not be present in sewage sludge and will not therefore be distributed to soil via spreading of sewage onto agricultural land. Direct and indirect exposures of the terrestrial compartment is unlikely.