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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

The log Kow of the substance was calculated to be 6.9 at 25°C. The log Kow of the substance was also experimentally determined, as the log Kow of the constituents of the substance KY-RB (EC# 423-070-8) has been determined. KY-RB is a reaction mass of 3 constituents, containing the substance MDI/CHA as constituent. In this study, the log Kow for MDI/CHA was determined to be 3.8.

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
20 °C

Additional information

The log Kow of the substance was calculated by the Rekker method using prolog P program. The log Kow of the constituents of KY-RB was determined in a GLP-compliant study in accordance with EC A.8 (1992) and OECD 117 (1989) using the HPLC method.