Registration Dossier
Registration Dossier
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EC number: 204-171-4 | CAS number: 117-08-8
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: Only secondary quotation, original study not available.
Data source
Reference
- Reference Type:
- secondary source
- Title:
- Study No. MO20020123. Biodegradation testing of TETRATHAL, 1973
- Author:
- Solutia Inc.
- Year:
- 1 973
- Bibliographic source:
- Cited in: IUCLID (2003). published data set from Solutia Inc., Tetrachlorophthalic Anhydride, CAS NO. 117-08-8, 20 May 2003
Materials and methods
- Principles of method if other than guideline:
- A Semi-Continuous Activated Sludge (SCAS) biodegradation test procedure was employed, patterned after the standard method as found in JAOCS 42:986 (1965) and JAOCS 46:432 (1969). Due to the low solubility of Tetrathal in water, sodium tetrachlorophthalate was used in this test. The agent was added at a rate of 100 mg per 24 hr cycle. Direct UV spectroscopic analysis was used to determine loss from the aqueous phase after sludge filtration at predetermined points of analysis between day 16 and 122.
- GLP compliance:
- not specified
Test material
- Reference substance name:
- sodium tetrachlorophthalate
- IUPAC Name:
- sodium tetrachlorophthalate
- Details on test material:
- - Name of test material (as cited in study report): Sodium tetrachlorophthalate
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Duration of test (contact time):
- 4 mo
Initial test substance concentration
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
Results and discussion
% Degradation
- Parameter:
- % degradation (test mat. analysis)
- Value:
- 0.2
- Sampling time:
- 24 h
- Details on results:
- Mean disappearance rate between study days 16 and 122 was 0.2+/-2.0.
Sodium Tetrachlorophthalate appeared to be essentially inert with respect to any toxic effects on the bacterial sludge. No inhibition of the sludge growth rate was noted during the course of the testing.
Applicant's summary and conclusion
- Interpretation of results:
- under test conditions no biodegradation observed
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