Registration Dossier

Diss Factsheets

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)

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2012
Report date:
2012

Materials and methods

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

Test material

Constituent 1
Chemical structure
Reference substance name:
Pyridinium, 1-[4-[[4-[2-[5-(acetylamino)-2-methoxy-4-[2-(3,6,8-trisulfo-2-naphthalenyl)diazenyl]phenyl]diazenyl]-8-sulfo-1-naphthalenyl]amino]-6-amino-1,3,5-triazin-2-yl]-3-carboxy-, inner salt, sodium salt (1:?)
EC Number:
691-442-9
Cas Number:
1316184-44-7
Molecular formula:
C38H29N11O16S4 . x Na x=1~4
IUPAC Name:
Pyridinium, 1-[4-[[4-[2-[5-(acetylamino)-2-methoxy-4-[2-(3,6,8-trisulfo-2-naphthalenyl)diazenyl]phenyl]diazenyl]-8-sulfo-1-naphthalenyl]amino]-6-amino-1,3,5-triazin-2-yl]-3-carboxy-, inner salt, sodium salt (1:?)

Study design

Inoculum or test system:
activated sludge, domestic, adapted
Reference substance
Reference substance:
other: Sodium acetate

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
6
Sampling time:
28 d
Details on results:
Points of degradation plot (test substance):
1 % degradation after 2 d
1 % degradation after 5 d
1 % degradation after 7 d
3 % degradation after 9 d
3 % degradation after 14 d
3 % degradation after 19 d
4 % degradation after 23 d
6 % degradation after 27 d
6 % degradation after 29 d

BOD5 / COD results

Results with reference substance:
Points of degradation plot (reference substance):
14 % degradation after 2 d
46 % degradation after 5 d
62 % degradation after 7 d
71 % degradation after 9 d
77 % degradation after 14 d

Any other information on results incl. tables

The test substance was not readily biodegradable under the conditions of the modified Sturm test presently performed.

Applicant's summary and conclusion

Interpretation of results:
other: not readily biodegradable
Conclusions:
The test substance was not readily biodegradable under the conditions of the modified Sturm test presently performed.