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EC number: 251-908-0 | CAS number: 34274-28-7
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
No long-term test data are available for freshwater sediment-dwelling organisms.
Two short-term supporting studies are available for ATMP-H:
A 10-day LC50 value of >2910 mg active acid/kg dw has been determined for the effects of ATMP-H on mortality of the marine sediment-dwelling invertebrate Corophium sp.
A 10-day LC50 values of >5000 mg/kg dw has been determined for the effects of ATMP-H on the mortality of the marine sediment dwelling organism, Corophium volutator.
Key value for chemical safety assessment
Additional information
ATMP-xNH4will dissociate when it is released into aqueous environments, including sediments, to yield ATMP and ammonia. ATMP and ammonia will be treated separately for the purposes of deriving PNECs for the sediment compartment.
No data is available for ATMP ammonium salts, therefore data have been read-across from ATMP-H.
There are no long-term data available for sediment dwelling organisms.
In a supporting short-term sediment toxicity test, a 10-day LC50 value of >2910 mg active acid/kg dw has been determined for the effects of ATMP-H on mortality of the marine sediment dwelling organism, Corophium sp. (TNO, 1997).
In a second supporting short-term sediment toxicity test, a 10-day LC50 value of >5000 mg/kg dw, nominal concentration, has been determined for the effects of ATMP-H on mortality of the marine sediment dwelling organism, Corophium volutator (Zeneca, 1995).
As an inorganic ion, ammonium is ubiquitous in the environment, is not bioaccumulative and is highly water soluble.
Test data for the derivation of PNECs for ammonia for the protection of sediment-dwelling organisms are therefore not required.
A PNECsediment for ATMP has been determined from the PNECaquatic by the equilibrium partitioning method.
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