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EC number: 223-267-7
CAS number: 3794-83-0
(14 d) NOEC 60 mg active acid/L O. mykiss
A 14 d NOEC value of 60 mg/L (as active
acid) has been determined for the effects of HEDP acid on the altered
behaviour and loss of equilibrium of the freshwater fish S Gairdneri
(now known as Onychorhynchus mykiss).
A 14 day LC50 of 180 mg/L (as active acid)
has also been determined based on mortality. For details on the study
refer to KEY (r-a) 14 d Short-term toxicity to fish, ABC 1979.001 It is
possible to read-across these values to HEDP-4Na based on the
information reported in the Short term toxicity to fish Endpoint
A longer toxicity testing with fish is not
considered necessary because:
- PNECfreshwater has been derived from long
term Daphnia data; the risk characterisation ratios (RCR) based
on PNECsediment derived from this method are <1.
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