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EC number: 203-596-2
CAS number: 108-58-7
Results of the probit analysis
Results of the probit analysis: Selected effective concentrations (LCx)
of the test item and their 95%- and 99%-confidence limits (according to
Slope function after Litchfield and Wilcoxon: 1.352
n.d.: not determined due to mathematical reasons or inappropriate data
Slope function after Litchfield and Wilcoxon: 1,131
A study was performed to assess the acute toxicity of Resorcindiacetat
to Danio rerio under semi-static conditions with daily renewal of test
The study was conducted in accordance with Council Regulation (EC) No
440/2008, Method C.1 'Acute toxicity for Fish' (2008) which is in most
parts equivalent to the OECD Guideline for Testing of Chemicals No. 203
'Fish, Acute Toxicity Test' (1992).
Groups of seven fish of the recommended size were exposed to a range of
concentrations, nominally 0.31, 0.63, 1.3, 2.5 and 5 mg/L of
Resorcindiacetat dissolved in dilution water. Auxiliaries used to
prepare the test media were an ultra turrax, a magnetic stirrer, a
folded filter and an aseptic filter.
Observations were made on the numbers of dead fish and the incidence of
sub-lethal effects after 2, 24, 48, 72 and 96 hours of exposure. The
following values were determined:
All results are expressed in terms of geometric mean measured
concentrations calculated on base of the sum of Resorcindiacetate,
Resorcinmonoacetate and Resorcin. Because of a lacking dose/response
relationship the LC 50 values at 48 h and 96 hours could not be
determined by probit analysis.
Effective concentrations calculated as sum of Resorcindiacetate,
Resorcinmonoacetate and Resorcin ranged from 106.5 % to 128.6 % of
nominal values in the freshly prepared media and from 55.0 % to 121.8 %
of nominal values in the media after 24 hours of exposure according to
the semi-static test conditions.
The hardness of the dilution water used was 13.6 °dH (= 243 mg/L CaCO3).
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