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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

Screening and/or higher tier studies investigating the adsorption potential of ortho-phthalaldehyde do not need to be conducted due to the low octanol water partition coefficient of log Kow = 0.99 of the substance. 

The adsorption/desorption coefficient of ortho-phthalaldehyde used for the environmental risk assessment was estimated to be approximately 10 L/kg using the QSAR model KOCWIN v2.00 (SMILES: O=Cc1ccccc1(C=O)).

Key value for chemical safety assessment

Koc at 20 °C:
10

Additional information