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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 22, 1984
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Deviations:
yes
Remarks:
poorly documented
GLP compliance:
not specified
Specific details on test material used for the study:
2-methoxy-4-propenylphenol methyl ether.
Purity: 99.5%
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, non-adapted
Duration of test (contact time):
4 wk
Initial conc.:
100 mg/L
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
TEST CONDITIONS
- Suspended solids concentration: 30 mg/L
- Temperature: 25 ± 1 ºC
Key result
Parameter:
% degradation (O2 consumption)
Value:
89
Sampling time:
28 d
Remarks on result:
other: BOD
Key result
Parameter:
% degradation (TOC removal)
Value:
99
Sampling time:
28 d
Key result
Parameter:
% degradation (test mat. analysis)
Value:
100
Sampling time:
28 d
Remarks on result:
other: HPLC
Details on results:
Test item was determined to be readily biodegradable.
Validity criteria fulfilled:
not specified
Interpretation of results:
readily biodegradable
Conclusions:
The substance is readily biodegradable since the degradation was of 89% based on BOD, 99% based on TOC and 100% based on HPLC after 28 days.
Executive summary:

A MITI biodegradation test was performed according to the OECD Guideline 301C. Activated sludge (30 mg/L) were exposed to 100 mg/L test item for 28 days. Oxygen consumption was measured during this perior allongside with the test item concentration (HPCL analysis). The percentages of degradation in 28 days were determined to be 89 based on BOD, 99 based on TOC and 100 based on HPLC. Test item was determined to be readily biodegradable.

Description of key information

Key study: Test method OECD 301C. The substance is readily biodegradable since the degradation was of 89% based on BOD, 99% based on TOC and 100% based on HPLC after 28 days.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable
Type of water:
freshwater

Additional information