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EC number: 237-864-5
CAS number: 14025-15-1
Three studies with EDTA salts or complexes have been performed,
examining different end-points (vegatative vigour and seedling
emergence) in different plant species. In the 21d veg vigour study
(Evangelou et al., 2006) a true NOEC could be established, while in the
14d seedling emergence test (Geebelen et al., 2002) no effect was
observed at the highest tested dose. Recalculation of the NOEC from
EDTA-Na2H2 to EDTA-CuNa2 will give a NOEC of 99.2 mg/kg soil dw.
The study from Fiebig (2019) which was performed with EDTA-CuK2
according to OECD TG 208 gave a lowest EC50 of 225 mg test substance/kg
dw for the number of emerged seedlings of soybean. The batch of
EDTA-CuK2 had an active ingredient content of 92%. The EC50 based on
active ingredient is then 207 mg a.i./kg dw.
This result is recalculated to EDTA-CuNa2 complex (see chapter 13 for
justification) using the ratio of the MW's (of 397.3/430) resulting in
an EC50 of 191.3 mg EDTA-CuNa2/kg dw. The study from Fiebig will be
based on the higher quality be used for the terrestrial hazard
The hazard assessment of EDTA-CuNa2 reveals
neither a need to classify the substance as dangerous to the
environment, nor is it a PBT or vPvB substance. The substance is
expected to have a low potential for adsorption based on its ionic
structure under environmental relevant pH conditions and its low log Kow
, the low log Kow also indicates that the substance will not be
bioaccumulative. There are no further indications that the substance may
be hazardous to the environment.
to three terrestrial plant species was
determined according to OECD 208 (July 2006)in
a seedling emergence and seedling growth tests over a period of 21 days.
The test systems comprised one
monocotyledon (oats, Poaceae) and two dicotyledons (rape, Brassicaceae;
The test was conducted with the test
concentrations of 1000 - 400 - 160 - 64 - 25.6 mg/kg soil dry weight
(DW) (factor 2.5).
The test item dissolves well in
water and was incorporated into the soil in which the seeds were sown.
The test containers were bottom watered with nutrient solution as needed.
The stock solution was sampled prior
to application and subsequently analytically verified. The measured
concentration of EDTA-CuK2was 101 % indicating the correct preparation
of the stock solution.
Potential toxic effects of the test
item were assessed on day 7, 14 and 21 by visual observations (number of
emerged seedlings and phytotoxic effects) and at test end by shoot
height and shoot fresh weight determination.
The results of the control for all
plant species met the required validity criteria. Therefore, the test is
considered to be valid.
Height: NOEC, LOEC, EC25- and EC50-Values with
Confidence Range (p)
p = 95%[mg/kg DW]
364 - 626
Fresh Weight: NOEC, LOEC, EC25- and EC50-Values
with Confidence Range (p)
746 - > 1000
182 - 300
317 - 500
120 - > 400#
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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