Registration Dossier
Registration Dossier
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EC number: 244-343-6 | CAS number: 21351-39-3
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Uronium hydrogen sulphate has no inhibitory effect on sewage sludge microorganisms.
Uronium hydrogen sulphate readily degrades to urea and sulfuric acid and/or sulfate ions in the environment and these degradation products are considered in the assessment:
- With sulphate (as calcium salt), the 3 h EC50 value was >1000 mg/L and the NOEC was 1000 mg/L (the highest dose tested, OECD 209, GLP)
- With urea, the 72 hour toxicity threshold of Entosiphon sulcatum to urea was 29 mg/l, and the 16 hour toxicity threshold of urea to Pseudomonas putida was > 10000 mg/l. Moreover, urea sulphate is considered as readily biodegradable.
It can be concluded that Uronium hydrogen sulphate and its degradation products are no inhibitory effect on sewage sludge microorganisms.
Key value for chemical safety assessment
Additional information
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