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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

EC50 for microorganisms:
175.4 mg/L

Additional information

The key study is a GLP-conform study according to OECD 209 guideline on the effect of bismuth subnitrate (Bi5O(OH)9(NO3)4) on the activated sludge respiration inhibition after seven days equilibration of the test substance in deionised water (Egeler et al., 2010; Klimisch 1). A concentration-related effect was observed only in the highest concentration level (300 mg Bi/L), where respiration compared to the controls was inhibited by approximately 17%. Since this inhibition was not statistically significant at p ≤ 0.05, the NOEC is ≥ 300 mg Bi/L. An EC10 of 175.4 mg Bi/L was calculated based on nominal concentrations.

The measured dissolved Bi concentrations were <0.3 mg Bi/L, except for highest dose, where an average concentration of 14.1 mg Bi/L was measured (corresponding to 4.7% of the total nominal concentration). The NOEC and EC10 expressed as dissolved Bi concentration (based on recovery of 4.7%) are ≥14.1 and 8.2 mg Bi/L.