Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

activated sludge respiration inhibition testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

Data source

Materials and methods

Results and discussion

Details on results:
The lowest endpoint for Zn to mircoorganisms was taken from the REACH dossier of Zn oxide (CAS 1314-13-2). In a key study, a NOEC of 100 µg Zn/L with respect to the nitrification rate was determined. In the dissolution/transformation test the maximum Zn concentration of three replicates/concentrations were 11, 28 and 300 µg/L at a loading rate of 1, 10 and 100 mg/L. Based on the comparison of the dissoluted/transformed Zn concentration and the NOEC, it can be concluded that the NOEC of the substance to microorganisms is above the loading rate of 10 mg/L.

Applicant's summary and conclusion