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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

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Reference substance name:
SR531
IUPAC Name:
SR531
Details on test material:
Sponsor's identification: SR531
Description: pale yellow liquid
Batch number: KTE0864
Date received: 16 June 2010
Expiry date: 16 December 2010
Storage conditions: room temperature in the dark

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
sewage, predominantly domestic, non-adapted
Details on inoculum:
A mixed population of activated sewage sludge micro-organisms was obtained on
5 July 2010 from the aeration stage of the Severn Trent Water Pie sewage treatment
plant at Loughborough, Leicestershire, UK, which treats predominantly domestic
sewage.
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
10 mg/L
Based on:
other: carbon
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal
Reference substance
Reference substance:
benzoic acid, sodium salt

Results and discussion

% Degradation
Parameter:
% degradation (DOC removal)
Value:
28
Sampling time:
28 d

BOD5 / COD results

Results with reference substance:
Sodium benzoate attained 72% degradation after 14 days 84% degradation after
28 days thereby confirming the suitability of the inoculum and test conditions.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
inherently biodegradable