Registration Dossier
Registration Dossier
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EC number: 211-185-4 | CAS number: 632-79-1
Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- March to December 1978
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The study is well-characterized in the report; however, it was not conducted according to modern guidelines.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 978
Materials and methods
- Principles of method if other than guideline:
- 14C-TBPA applied to silica gel and irradiated with UV light for varying lengths of time. Analyzed via TLC, GC, Liquid scintillation.
- GLP compliance:
- not specified
- Type of study / information:
- Hydrolysis and UV degradation.
Test material
- Reference substance name:
- 14C-tetrabromophthalic anhydride
- IUPAC Name:
- 14C-tetrabromophthalic anhydride
- Details on test material:
- 14C-TBPA; see rat PK study.
Constituent 1
Results and discussion
Any other information on results incl. tables
Test article rapidly hydrozyed on silica gel to TBPA acid in the absence of light. ID as the TBPA-acid confirmed by GC using authentic standard.
On UV radiation, test article rapidly and steadily degraded to other products. Half life estimated as ~ 5hr, degradation rate followed first order kinetics during the first few hrs and second order kinetics for the remaining experimental time. Ten degradants detected by TLC. Maximum amounts reached at 1 -2 days of irradiation and then gradually decreased to yield more polar products. The later was suspected of being polymerized product due to TLC behaviour (Maximum of 39% of applied 14C-activity after 2 days irradiation). Amount of other 14C-materials ranged from 0 -7% of applied radioactivity. Total 14C-material (recovery) decreased with time (96.93% at t0 to 31.56% at d10) indicating formation of volatile degradation products, which were not characterized.
Applicant's summary and conclusion
- Conclusions:
- 14C-TBPA applied to silica gel and irradiated with UV light. 14C-TBPA rapidly hydrolyzed in the absence of light to TBPA-acid. Further degradation occurred with exposure to light. The half life was estimated as ~5 hr.
- Executive summary:
14C-TBPA applied to silica gel and irradiated with UV light. 14C-TBPA rapidly hydrolyzed in the absence of light to TBPA-acid. Further degradation occurred with exposure to light. The half life was estimated as ~5 hr.
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