Registration Dossier
Registration Dossier
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EC number: 284-362-7 | CAS number: 84852-49-3
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
96 h LC50 ca. 215 mg active acid/L (r-a) Salmo gairdneri (new name: Oncorhynchus mykiss) (read-across, reliabilty 1)
96 h LC50 6435 mg active acid/L (r-a) Cyprinodon variegatus (read-across, reliabilty 1)
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 270 mg/L
Marine water fish
Marine water fish
- Effect concentration:
- 6 435 mg/L
Additional information
Freshwater
No data on short term toxicity of DTPMP-xK salts, CAS 84852-49-3, on short term toxicity to freshwater fish are available, however since the data is related to active acid content and it is possible to freely read-across from DTPMP acid (CAS 15827-60-8) and sodium salt (CAS 22042 -96 -2) to the potassium salt and the lowest EC50 is represented by data on the acid, this has been read-across.
A reliable 96 h LC50 value of ca. 215 mg/L (as active acid) has been determined for the effects of DTPMP acid on the mortality of the freshwater fish Salmo gairdneri (new name: Oncorhynchus mykiss).
The results of tests conducted on DTPMP and its salts are directly comparable, because the substance will fully dissociate in solution and the ionisation state will depend only on the pH of the test medium. The counterion is not considered to contribute to effects in fish. At environmentally-relevant pH values, DTPMP will be ionised typically 6-8 times, and will form stable complexes with metal ions.
Here, the value of 215 mg active acid/L may be directly read-across.
Marine
No data on short term toxicity of DTPMP-xK salts, CAS 84852-49-2, to marine fish are available. However, a reliable 96 h LC50 value of 6435 mg active acid/l has been determined for the effects of DTPMP acid (CAS 15827-60-8) towards the mortality of the marine fish Cyprinodon variegatus.
The results of tests conducted on DTPMP and its salts are directly comparable, because the substance will fully dissociate in solution and the ionisation state will depend only on the pH of the test medium. The counterion is not considered to contribute to effects in fish. At environmentally-relevant pH values, DTPMP will be ionised typically 6-8 times, and will form stable complexes with metal ions.
Here, the value of 6435 mg equivalent active acid/L may be directly read-across.
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