Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
biodegradation in water: ready biodegradability
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well-documented study designed to evaluate the influence of silicate on functioning of model sewage treatment plant rather than the toxicity towards microorganisms.
Qualifier:
according to
Guideline:
other: OECD Confirmatory test, conforming with 82/242/EEC and 82/243/EEC
Deviations:
not specified
GLP compliance:
yes
Remarks:
Henkel KGaA Forschung Biologie, Oekologie.
Oxygen conditions:
aerobic
Inoculum or test system:
other: activated sludge of a predominantly domestic sewage
Initial conc.:
25 mg/L
Based on:
test mat.
Details on results:
RESULTS: EXPOSED
- Biodegradation: >90% of added sodium silicate was detected in the effluent. No significant elimination was observed. The test substance had no adverse effects on the model sewage plant.
RESULTS CONTROL: There were no significant differences in DOC, pH or dry mass of sludge between the control and silicate-dosed biodegradation unit.
STATISTICAL RESULTS: Not reported.
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
other: Product brochure of producers association
Adequacy of study:
other information
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Product brochure of producers association; data without proof.
Details on results:
Not applicable (inorganic substance)

No biodegradation since inorganic substance.

Description of key information

No biodegradation since inorganic substance.

Key value for chemical safety assessment

Additional information

No biodegradation since inorganic substance. According to REACh legislation, Annex VII - X, 9.2, column 2, no further degradation testing required based on chemical safety assessment.