Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

For key values, see respective endpoint summaries. For a short summary of available information, see section "Additional information" below.

Additional information

Adsorption/desorption

The organic carbon normalized adsorption coefficient (Koc) was determined within a reliable QSAR study. The key value was determined using the valid (see QMRF) key model "OPERA-model for organic carbon-sorption coefficient" (V1.5) available from the US EPA Chemistry Dashboard. Results were demonstrated to be reliable (see QPRF) and were corroborated by 2 valid supporting models.   

Overall, the following log Koc values were estimated:

Key model:                                                                          2.84 (rounded, equivalent to Koc = 698 L/kg)

Supporting model 1 (Huuskonen (Sw)):                                2.83

Supporting model 2 (Poole and Poole (LSER)):                    2.89

Conclusion:

Relevant organic carbon normalized adsorption coefficient (Koc):

Koc = 698 L/kg

Henry's Law Constant

n-Undecanal is of relevant volatility with respect to environmental waters and moist soil: HLC = 64.3 Pa*m³/mol, 20 °C. The value was estimated from QSAR (Bond Estimation Method, HENRYWIN v3.20) and corroborated via calculation from vapour pressure and water solubility (53.9 Pa*m^3/mol at 20°C).