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Long-term toxicity to aquatic invertebrates

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Description of key information

There are no test data for the substance. A 28 day NOEC value of >= 25 mg/L (as active acid) has been determined for the effects of  ATMP acid (CAS 6419-19-8) on adult survival and reproduction of D. magna.

Key value for chemical safety assessment

Additional information

DTPMP-xNH4 will dissociate when it is released into aqueous environments to yield DTPMP and ammonia.

The assessment of long-term toxicity of the substance to aquatic invertebrates will, for the purposes of hazard classification and in the absence of test data, be based on treating the substance as a preparation. Test data do not indicate that DTPMP acid is toxic to invertebrates following long-term exposure. However the un-ionised ammonia moiety is however known to be toxic to aquatic organisms and concentration limits, as stipulated in the Annex I (DSD)/Annex VI (CLP) entry for ammonia.

DTPMP and ammonia will also be treated separately for the purposes of deriving PNECs for the aquatic compartment. A PNECaquatic for ammonia has already been derived by the UK Environment Agency for the purpose of setting an Environmental Quality Standard (EQS) under Annex VIII of the Water Framework Directive (WFD). The relevant data are presented in section 7.6 of the CSR. This PNEC is also considered to be adequate for the purpose of risk characterisation of ammonia present in DTPMP-xNH4. A PNEC for DTPMP will be determined using test data for the substance.