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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

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Description of key information

The NOEC value for both total respiration and heterotrophic respiration was determined to be ≥ 1000 mg L-1.

Key value for chemical safety assessment

Additional information

This study evaluated the effect of Diammonium sodium hexakis (Nitrito-N) rhodate on the respiration of activated sludge (Muckle 2015). The study is reliable without restrictions, being GLP compliant and having followed the standard guidelines OECD 209, and EU-Method C.11. The duration of the test was 3 hours. Activated sludge, which was collected from a predominantly domestic sewage treatment plant, was used as inoculum. The substance 3,5-dichlorophenol was used as a positive control. Two experiments were carried out, a range-finding test followed by a limit test. All validity criteria were met.

At the nominal concentration of 1000 mg L-1, no significant inhibition was observed in treatments with and without the nitrification inhibitor N-allylthiourea (ATU). The respective NOEC value for both total respiration and heterotrophic respiration was determined to be ≥ 1000 mg L-1 nominal concentration.