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EC number: 222-720-6
CAS number: 3586-55-8
Data on formaldehyde
There is no study available on
adsorption of formaldehyde in soils and sediments. Therefore, the Koc
was estimated according a QSAR model described in EU Technical Guidance
Document on Risk Assessment (EC 2003). Based on a log Pow of 0.35 and
the QSAR for non-hydrophobics, the Koc is calculated to be 15.9 L/kg.
Therefore, formaldehyde is expected to exhibit only a weak adsorption in
soils and sediments.
Additionally, a calculation of the
fugacity model (Level 1) according to Mackay (1991), using the “unit
world” given in Jørgensen & Bendoricchio (2001), demonstrates that
formaldehyde is preferentially distributed to the hydrosphere (98.7%).
Distribution into other environmental compartments is of secondary
In conclusion, the available data on
distribution in the environment is sufficient for the risk assessment.
Adsorption of relevant amounts of formaldehyde on soils and sediments is
not expected and the hydrosphere is the target compartment.
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