Registration Dossier
Registration Dossier
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EC number: 231-830-3 | CAS number: 7758-02-3
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Ammonium bromide is not inhibitory to sewage sludge microorganisms (EC50 > 1000 mg/L)
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
Additional information
Potassium bromide is an inorganic salt that dissociates to its composite ions in aqueous solutions at environmental pH and temperature. Comparison of the available data on the various bromide salts have shown that the bromide ion is the relevant ion for determination of the toxicological profile with simple cations such as potassium, sodium or ammonium, that are ubiquitous in nature, having little or no influence on the bromide ion properties. It is therefore justified to read-across data from other inorganic bromide salts to potassium bromide.
In a key study conducted according to OECD Guideline No 209. Activated sludge from a domestic waste water treatment plant was used.
The respiration rates measured at 63, 125, 250, 500 and 1000 mg ammonium bromide/L were 51.7, 51.7, 55.2, 50.7 and 46.9 mg O2/[L x h], respectively. This corresponds to respiration inhibitions by the test item of -1.6, -1.7, -8.5, 0.3 and 7.8%.
E20 (95% C.I.) = 1272.7 mg ammonium bromide/L (1006.6 - 13680.2)
E50 (95% C.I.) = 1739.4 mg ammonium bromide/L (1281.3 - 28567.1)
E80 (95% C.I.) = 2206.0 mg ammonium bromide/L (1529.7 - 43480.5)
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