Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 204-211-0 | CAS number: 117-81-7
Endpoint summary
Administrative data
Description of key information
Additional information
General discussion of environmental fate and pathways:
Based on available data and described in the following sections, the environmental fate and pathways of DEHP can be summarized as follows:
As volatilization DEHP is very limited at ambient temperature, and half-life in the atmosphere is of 1 day due to phototransformation, DEHP may not contaminate the air compartment.
Being not soluble in water (3µg/L) the hydrolysis and photolysis of DEHP are not expected in water. With a high potential of adsorption (Log Kow = 7.5; Log Koa=10.5 and Koc estimated at 165,000) the equilibrium for DEHP is in favor of particles. Thus the transport of DEHP in aquatic environments will to a high degree depend on the transport of particles.
Therefore final compartments for DEHP are expected to be sediments and soils.
DEHP has been demonstrated to be readily biodegradable in water, fulfilling the 10-day window requirement. Considering the high adsorption of DEHP on particles and since sediment reaches low oxygen level, sediment is considered as the final compartment for DEHP in aquatic systems. This distribution is supported by the distribution modelling Mackay Level 1. Simulation studies on degradation in surface water, sediment and soil are available. Due to the very heterogeneous DT50 values obtained in these studies, conservative half-lives for these media are assumed:
• DT50 freshwater (12°C): 50 days
• DT50 bulk sediment (12°C): 300 days
• DT50 soil (12°C) 300 days
Based on a partition coefficient of 7.5, DEHP should be expected to be bioaccumulative in organisms. However, based on multiple bioaccumulation studies in aquatic systems, it appears that DEHP does not bioaccumulate and even shows food web biomagnifications factor below 1 indicating a trophic dilution. Moreover in terrestrial environment, DEHP is bioaccumulated neither by plants nor by soil organisms.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
