Registration Dossier

Administrative data

activated sludge respiration inhibition testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
Justification for type of information:
In accordance with Annex VIII, section 9.1.4, column 2 of REACH Regulation, activated sludge respiration inhibition testing does not need to be conducted if there are mitigating factors indicating that microbial toxicity is unlikely to occur.
The test substance is composed of quartz (SiO2) and chalk (CaO). Both are natural constituents of different type of soils (e.g. sand) and can be found ubiquitous in nature. Observations show that microorganisms show a high tolerance towards constituents of sand. Therefore any adverse effect on microorganisms in sewage treatment plants can be excluded and a test is scientifically not justified.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion