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EC number: 201-052-9
CAS number: 77-73-6
The effect of DCPD on the nitrification of
soil microorganisms was determined in a GLP-compliant study following
OECD guideline 216. No inhibiting effect on the nitrification potential
was observed up to a concentration of 1000 mg/kg SDW, the highest
concentration tested. The NOEC is therefore considered to be =1000 mg/kg
effect of DCPD on earthworm reproduction was determined in a
GLP-compliant study following OECD guideline 222. Earthworms were
exposed to 6 concentrations of DCPD alongside a control in artificial
soil. There were no statistically significant differences in earthworm
reproduction in the treatment rates 15.6 to 125 mg DCPD/kg SDW compared
to the control. However, at the test item concentration 250 mg DCPD/kg,
the earthworm reproduction was statistically significantly reduced and,
at the test item concentration 500 mg DCPD/kg soil dry weight, no
juveniles were found. Overall, the NOEC of the test item concerning
mortality, biomass and reproduction was determined to be 125 mg DCPD/kg
SDW and based on reproduction. The EC50 value for
reproduction was determined to be 250
TLM QSAR modelling was used to estimate the
LC50 and EC10 values towards F. candida. The calculated LL50 is
55.475 mg/kg soil dw and NOELR is 10.627 mg/kg soil dw.
TLM QSAR modelling was used to estimate the LL50
and NOELR values towards terrestrial plants. The calculated LL50 for A.
sativa is 253.568 mg/kg soil dw and NOELR is 48.576 mg/kg soil dw.
The calculated LL50 for B. rapa is 163.717 mg/kg soil dw and NOELR
is 31.363 mg/kg soil dw.
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