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EC number: 287-476-5
CAS number: 85535-84-8
No relevant data for SCCPs is currently available. Incubation of soil for 28 days with nominal concentrations of Cereclor S52 (a C14-17 chlorinated paraffin; 52% chlorination) at up to 400 mg/kg dry wt soil had no effect on the extent of transformation of soil nitrogen to nitrate. The NOEC for this MCCP is 400 mg/kg dry wt of soil in this test system.
No relevant data for SCCPs is currently
In a GLP study conducted according to OECD
Guideline 216, the effect of Cereclor S52 (a C14-17 chlorinated
paraffin; 52% chlorination) at 25, 50, 100, 200 and 400 mg/kg dry wt
soil (nominal concentration) on the transformation by soil
microorganisms of an organic nitrogen source (lucerne) to nitrate over a
period of 28 days has been assessed. Nitrapyrin, a substance known to
inhibit nitrogen transformation, was found to decrease nitrate formation
by 35 and 29% when present at concentrations of 3.2 and 20 mg/kg dry wt
of soil, respectively.
No statistically significant decrease in
nitrate formation was seen at any concentration of Cereclor S52,
indicating that the no-observed-effect concentration (NOEC) in this test
is 400 mg/kg dry wt of soil. Based on the default soil characteristics
used in the TGD, this NOEC is equivalent to 500 mg/kg dry wt, which when
adjusted for a soil organic carbon content of 2%, is equivalent to 440
mg/kg wet wt (Thompson, 2002).
In view of
the similarities in structure and physiochemical properties [between
SCCPs and MCCPs], it can reasonably be predicted that SCCPs would have
similar effects to MCCPs.
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