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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

Phototransformation in air

After evaporation or exposure to the air, phthalonitrile will be photodegraded slowly by reaction with OH radicals (half-life = 349 d).



Due to the structural properties, hydrolysis of phthalonitrile is not expected.



Not readily biodegradable according to OECD criteria but readily biodegradable after use of adapted inoculum. Furthermore, phthalonitrile can be easily eliminated from water.



Significant accumulation in organisms is not to be expected.


Adsorption / desorption

Adsorption of the substance to the solid soil phase is not expected under environmentally relevant conditions.


Henry's Law constant

Phthalonitrile is not expected to evaporate into the atmosphere when released to the water surface.