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Physical & Chemical properties

Partition coefficient

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Description of key information

In accordance with column 2 of REACH Annex VII, the test cannot be performed, as the substance decomposes in water within a hour (half-time approx. 1 hour). The calculated partition coefficient (KOWWIN v 1.66) on the basis of the structural formula of 1,5 -naphthylene diisocyante is 4.37 (Currenta, 2010). The measured log Pow of the corresponding amine is 0.91 (MITI, 1992). 

Key value for chemical safety assessment

Log Kow (Log Pow):
0.91
at the temperature of:
25 °C

Additional information

The substance hydrolyses rapidly within 1 hour. Therefore, an experimental study with 1,5-naphthylene diisocyante is scientifically unjustified.