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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The environmental fate of ethylbenzene will be determined by biotic and abiotic degradation processes.

Hydrolysis:Evaluation of structure of ethylbenzene shows that it is not expected to hydrolyze appreciably in the environment on the basis of a lack of hydrolysable functional groups.

Phototransformation in air: half life of 1.8 days is estimated for reaction of ethylbenzene with hydroxyl radicals in the atmosphere at 25oC [AOPWIN Program, v.1.92]. Overall QSARs estimated half-life for degradation of ethylbenzene in air based upon AOPWIN Model is 36.14 hours.

Phototransformation in water

The estimated half-life of ethylbenzene in water is approximately 15 days (360 hours) using EPI Suite software.

Taking into account high volatility of ethylbenzene (half life of volatilization from water estimated as 1.13 hours (for a river) to 4.11 days (for a lake) using EPI Suite software), the most dominant environmental fate process will be photooxidation of ethylbenzene in the atmosphere.

Phototransformation in soil

Volatilisation of ethylbenzene from soil is expected to be significant based on its high vapour pressure. The estimated half-life of ethylbenzene in soil is approximately 30 days (720 hours) using EPI Suite software.