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EC number: 282-780-4
CAS number: 84418-68-8
of the aquatic toxicity of zinc neodecanoate, basic are not available. Read-across
to the assessment entities soluble zinc substances and neodecanoic acid
is applied for the assessment of zinc neodecanoate, basic since the ions
of zinc neodecanoate, basic determine its fate and toxicity in the
data available for soluble zinc substances and neodecanoate indicate
that the moiety of ecotoloxicological concern are zinc cations.
(short-term) toxicity data: The
lowest EC/LC50 values of 3 trophic levels (algae, invertebrates and
fish) for zinc range from are 0.136 mg Zn/L to 0.78 mg Zn/L, depending
also on solution pH and hardness, whereas
EC/LC50 values of neodecanoic acid derived in
reliable studies for
3 trophic levels (algae, invertebrates, fish) are >100 mg/L.
(long-term) toxicity: For
zinc, 23 distinct chronic
species ecotoxicity values were used applying the SSD approach and
“species mean” NOEC values used for PNEC derivation range from 19 to 530
µg/L with a resulting
HC5 of 20.6 µg Zn/L. For
neodecanoic acid, reliable
chronic data are available from GLP-conform guideline studies for two
trophic levels and point to a low potential for aquatic toxicity. A 21-d
NOEC of 4.78 mg/L neoheptanoic acid (structural analogue) for
reproduction of D. magna, further supported by the chronic Value (ChV)
of 1.7 mg/L (QSAR-based estimate) for daphnids, and a 14-d
NOEC of 2.22 mg/L neodecanoic acid for the growth of Oncorhynchus
mykiss, also supported by the chronic Value (ChV) of 1.6 mg/L
(QSAR-based estimate) for fish, indicate a
low potential for chronic toxicity of neodecanoic acid.
the toxicity to aquatic microorganisms, the lowest NOEC for
nitrification inhibition amounts to 0.1 mg Zn/L based on an ISO 9509
nitrification inhibition test. The
potential of neodecanoic acid for toxicity to microorganisms is low,
based on an unbound NOEC value of ≥ 200 mg/L derived for
the inhibition of nitrification.
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