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Environmental fate & pathways

Phototransformation in air

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Administrative data

Endpoint:
phototransformation in air
Type of information:
other: publication
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-Guideline study. Test material not characterized.

Data source

Reference
Reference Type:
publication
Title:
Photolysis studies of technical decabromodiphenyl ether (DecaBDE) and ethane (DeBDEethane) in plastics under natural sunlight.
Author:
Kajiwara et al.
Year:
2008
Bibliographic source:
Environ. Sci. Technol. 42, 4404-4409.

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
High impact polystyrene plastic formulated with DBDPEthane was ground. The powder was exposed to natural sunlight for up to 224 d by placing the powder in glass tubes on a rooftop. The tubes rotated throughout the day and were shaken by hand once per week. The powder was analyzed at intervals for DBDPEthane content.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: pellets
Details on test material:
Test article obtained from Weifang Yucheng Chemical Co., Ltd, Weifang, China

Study design

Light source:
sunlight
Details on light source:
Natural sunlight exposure from Sept 2006 to May 2007 in Tsukuba, Japan

Results and discussion

% Degradation
% Degr.:
0
Sampling time:
224 d
Test condition:
crushed polymer in sunlight
Transformation products:
no

Any other information on results incl. tables

Kajiwara et al. (2008) reported DBDPEthane did not undergo photodegradation when a pulverized high impact polystyrene resin containing the commercial product was exposed to sunlight irradiation for 224 days. This is a worst case scenario for photolysis-in-plastic given the plastic was ground prior to sunlight exposure and rotated throughout the 224 d sunlight exposure to ensure maximum exposure of the plastic particles to sunlight.

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable
Conclusions:
Kajiwara et al. (2008) reported DBDPEthane did not undergo photodegradation when a pulverized high impact polystyrene resin containing the commercial product was exposed to sunlight irradiation for 224 days. This is a worst case scenario for photolysis-in-plastic given the plastic was ground prior to sunlight exposure and rotated throughout the 224 d sunlight exposure to ensure maximum exposure of the plastic particles to sunlight.
Executive summary:

Kajiwara et al. (2008) reported DBDPEthane did not undergo photodegradation when a pulverized high impact polystyrene resin containing the commercial product was exposed to sunlight irradiation for 224 days. This is a worst case scenario for photolysis-in-plastic given the plastic was ground prior to sunlight exposure and rotated throughout the 224 d sunlight exposure to ensure maximum exposure of the plastic particles to sunlight.