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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Stability (Phototransformation in air):

After exposure to air, Bisphenol A will be rapidly degraded by photochemical processes. The rate constant for indirect photolysis in air (OH-mediated photodegradation) is 80.6E-12 cm3 / (molecule*sec) and half-life is 0.13 days, assuming 12 hours daylight and a hydroxyl radical concentration of 1.5E6 molecules per cm3.

Stability (Hydrolysis):

Based on the molecular structure of Bisphenol A, hydrolysis is not expected under environmentally relevant conditions.

Stability (Phototransformation in water):

Bisphenol A has a half-life of 0.5 to 10 days for direct photolysis and 0.7 to 1.3 days for indirect photolysis.

Biodegradation (in water, screening tests):

Bisphenol A is readily biodegradable.

Biodegradation (in water and soil, simulation tests):

Bisphenol A was found to be rapidly biodegraded by microbial consortia found in many natural waters and sediments, with lag times and half-lives on the order of a few days.

Biodegradation (in soil):

Bisphenol A dissipates in soil in less than 3 days, with a major route being conversion to non-extractable bound residues.


Bisphenol A has low potential for bioaccumulation based on laboratory bioconcentration factors of less than or equal to 73 L/kg in fish.

Transport and distribution (Adsorption/desorption):

The soil sorption organic carbon normalised partition coefficient values (Koc) of Bisphenol A range from 251 to 1507 L/kg, averaging 750 +/- 348 L/kg.

Transport and distribution (Henry´s Law constant):

At ambient temperature and atmospheric pressure, Bisphenol A is not volatile, with a Henry's law constant calculated to be 3.12E-7 Pa*m3/mol from aqueous solubility and vapour pressure.

Transport and distribution (Distribution modelling):

Level III Mackay-type modelling shows that nearly all Bisphenol A goes into the water and soil compartments. The exact proportion in each depends on where emissions enter the environment.

Environmental Monitoring:

Concentrations of Bisphenol A have been taken from reports and publications from 1996 to 2015 containing "reliable" or "very reliable" surface and/or sediment data from the European Union. The data were subjected to statistical analysis using the Kaplan-Meier method because the dataset contained numerous non-detected values.