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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
phototransformation in air
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Title:
No information
Author:
Aopwin v.1.92a
Year:
2009

Materials and methods

Principles of method if other than guideline:
Method: other (calculated): AopWin v.1.92a
GLP compliance:
no

Study design

Light source:
sunlight
Details on test conditions:
Sensitiser (for indirect photolysis): OH
Sensitiser concentration: 1500000 molecule/cm³

Results and discussion

Any other information on results incl. tables

HYDROXYL RADICALS
Hydrogen abstraction       =0.1360 x 10^-12 cm3/molecules-sec
Reaction with N, S and -OH =0.1400 x 10^-12 cm3/molecules-sec
Addition to aromatic Ring* =28.2124x 10^-12 cm3/molecules-sec
------------------------------------------------------------
-TOTAL OH Rate Constant = 28.4884x10^-12 cm3/molecules-sec
*designates estimation using assumed value

half life = 4.505hr = 0.375 day
(12 hrs/day; concentration of senziter: 1.5x10^6 OH/cm3)

Rate constant (for indirect photolysis):  0.0000000000284884 cm³/(molecule*sec)
Degradation in % (for indirect photolysis):  50  after 0.4 day(s)

Applicant's summary and conclusion

Conclusions:
Fairly rapid photodegradation.