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EC number: 250-610-8
CAS number: 31394-54-4
According to REACh legislation, Annex IX,
9.2, column 2, studies on further biotic degradation do not need to be
conducted if direct and indirect exposure of the water, sediment and
soil compartments is unlikely. For the purpose of risk assessment, PNECs
for hydrocarbon blocks incorporated into the PETRORISK model have been
derived using aquatic PNECs and the equilibrium partitioning method
(EqP). The outcome of the risk assessment with RCRs far below 1, i.e.
regional RCRs of 3.6E-06 (freshwater), 1.4E-06 (freshwater sediment),
1.0E-08 (marine), 2.9E-09 (agricultural soil), 4.3E-10 (grassland
(natural)) and local RCRs of 2.2E-02 to 9.0E-12 (effluent), 3.4E-02 to
6.9E-06 (freshwater), 3.4E-03 to 1.1E-08 (marine), 3.8E-02 to 7.9E-06
(freshwater sediment), 3.8E-03 to 4.0E-09 (marine sediment), 0.0E+00
(oral freshwater fish), 0.0E+00 (oral marine top predator), 4.7E-05 to
8.5E-09 (agricultural soil), 0.0E+00 (worm oral), do not indicate a risk
to the environment (see localCSR and regionalCSR in PETRORISK
spreadsheet attached in IUCLID section 13). Further, screening tests on
biodegradation in water demonstrate that isoheptane is inherently
biodegradable and shows the potential to degrade and disappear from the
environment. Thus, isoheptane is not expected to persist in the
environment under aerobic conditions and no further testing is required.
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