Registration Dossier

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:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data

Data source

Reference
Reference Type:
publication
Title:
Biodegradation and bioaccumulation data of existing chemicals based on the CSCL Japan
Author:
MITI
Year:
1992
Bibliographic source:
Compild under the Safety Division Basic Industries Bureau Ministry of International Trade & Industry, Japan. Edited by Chemicals Inspection & Testing Institute, Japan.

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: no information on the method
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
9-(2-carboxyphenyl)-3,6-bis(diethylamino)xanthylium chloride
EC Number:
201-383-9
EC Name:
9-(2-carboxyphenyl)-3,6-bis(diethylamino)xanthylium chloride
Cas Number:
81-88-9
Molecular formula:
C28H31N2O3.Cl
IUPAC Name:
9-(2-carboxyphenyl)-3,6-bis(diethylamino)xanthylium chloride

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Details on inoculum:
sludge: 30 mg/l
Duration of test (contact time):
ca. 28 d
Initial test substance concentration
Initial conc.:
ca. 100 mg/L
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Reference substance
Reference substance:
not specified

Results and discussion

% Degradation
Key result
Parameter:
% degradation (O2 consumption)
Value:
ca. 0
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
not readily biodegradable
Conclusions:
In a biodegradation test in water, basic violet 10 was found not readily biodegradable after 28 days when tested initially at 100 mg/L.