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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways

Phototransformation in air

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
phototransformation in air
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
Principles of method if other than guideline:
other: calculated with EPISuite v3.12, AOPWIN v1.91, model (US EPA, 2000)
GLP compliance:
not specified
Estimation method (if used):
Photochemical reaction with hydroxy radicals:
Sensitiser (for indirect photolysis): hydroxy radicals (OH)
Concentration of OH radicals: 1.5E06 molecules / cm3
Temperature for which rate constant was calculated: 25 °C
Daylight: 12 hours per day
Details on light source:
Sunlight
DT50:
0.13 d
Test condition:
calculated
Transformation products:
not specified
Validity criteria fulfilled:
not applicable
Conclusions:
The rate constant for indirect photolysis in air (OH-mediated photodegradation) for Bisphenol A 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.
Executive summary:

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.

Description of key information

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.

Key value for chemical safety assessment

Half-life in air:
0.13 d
Degradation rate constant with OH radicals:
0 cm³ molecule-1 s-1

Additional information