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Environmental fate & pathways

Biodegradation in water: screening tests

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:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

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
Chemical structure
Reference substance name:
Reaction mass of 3',5-diallyl[biphenyl]-2,4'-diol and 5,5'-diallyl[biphenyl]-2,2'-diol
Cas Number:
947686-05-7
Molecular formula:
C18H18O2
IUPAC Name:
Reaction mass of 3',5-diallyl[biphenyl]-2,4'-diol and 5,5'-diallyl[biphenyl]-2,2'-diol
Test material form:
solid

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
other: activated sludge from a biologic sewage treatment
Reference substance
Reference substance:
other: C8H5KO4 for TC (Batch no. MKBZ5705V, content 100.00 %), Na2CO3 (Batch no. 247259189 ≥ 99.5 %) and NaHCO3 (Batch no. 217256106, p.A. content 99.9 %) for IC

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
ca. 88
Sampling time:
28 d

Applicant's summary and conclusion

Executive summary:

Because the test item is a mixture the 10-day-window does not have to be taken into ac-count. As degradation reached the pass level of 60% in the course of the test, Magnolia Officinalis Bark Extract is considered as readily biodegradable.