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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 water
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1995
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1995

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EPA Guideline Subdivision N 161-2 (Photodegradation Studies in Water)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
2-(2-butoxyethoxy)ethyl 6-propylpiperonyl ether
EC Number:
200-076-7
EC Name:
2-(2-butoxyethoxy)ethyl 6-propylpiperonyl ether
Cas Number:
51-03-6
Molecular formula:
C19H30O5
IUPAC Name:
2-(2-butoxyethoxy)ethyl 6-propylpiperonyl ether

Study design

Light source:
sunlight
Duration of test at given test condition
Temp.:
25 °C
Initial conc. measured:
8.55 mg/L

Results and discussion

Spectrum of substanceopen allclose all
Parameter:
max epsilon
Value:
7 432
Parameter:
epsilon 295 nm
Value:
6 081
% Degradationopen allclose all
% Degr.:
48.5
Sampling time:
8 h
Test condition:
Direct photolysis
Test condition:
Indirect photolysis
Dissipation half-life of parent compound
DT50:
8.4 h
Test condition:
pH 7
Transformation products:
yes

Any other information on results incl. tables


14C-PBO was found to rapidly photolyze in an aqueous buffer at pH 7 and  25 °C 

when exposed to natural sunlight. Within 36 hours of exposure to  sunlight less 

than 10 % of the total radioactivity in the exposed sample  was 14C-PBO.  

The calculated t1/2  of the aqueous photolysis rate of PBO  was 8.4 hours of 

sunlight and the photolysis of PBO followed first order  kinetic. Two major 

degradates were observed at concentrations greater  than 10 % of the total 

radioactivity. One degradate was identified as an  alcohol degradate of PBO, 

the other was identified as the corresponding  aldehyde of the alcohol degradate.

Applicant's summary and conclusion

Conclusions:
The substance was found to rapidly photolyze in an aqueous buffer at pH 7 and  25 °C when exposed to natural sunlight.
DT50 = 8.4 hours at pH 7