Grape, red, ext.

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:

2017

Report date:

2017

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Grape, red, ext.

EC Number:

284-511-6

EC Name:

Grape, red, ext.

Cas Number:

84929-27-1

IUPAC Name:

5-[(1E)-2-(4-hydroxyphenyl)ethenyl]benzene-1,3-diol; 5-[(2R,3R)-6-hydroxy-2-(4-hydroxyphenyl)-4-[(1E)-2-(4-hydroxyphenyl)ethenyl]-2,3-dihydro-1-benzofuran-3-yl]benzene-1,3-diol

Test material form:

solid

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, adapted

Remarks:

(concentration in the test 25.0 mg dry matter/L)

Duration of test (contact time):

ca. 28 d

Results and discussion

% Degradation

% Degradation 1

Key result

Parameter:

% degradation (CO2 evolution)

Value:

ca. 11

Sampling time:

28 d

Remarks on result:

other: not readily biodegradable as the criterion of reaching 60% of degradation is not met

% Degradation 2

Key result

Parameter:

% degradation (CO2 evolution)

Value:

ca. 68

Sampling time:

8 d

Remarks on result:

other: As expected the positive control is readily biodegradable

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

not readily biodegradable

Conclusions:

For the test item Palmitoyl grapevine shoot extract only 11% biodegradation was observed after 28 days. The 10-day window could not be determined. The criterion of reaching 60% of degradation is not met. Therefore Palmitoyl grapevine shoot extract is considered as not readily biodegradable.