Registration Dossier
Registration Dossier
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EC number: 931-700-2 | CAS number: 66455-29-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Inhibition of activated sludge is not expected.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 27 mg/L
Additional information
Betaines, C12-14 (even numbered)-alkyldimethyl are readily biodegradable and show no toxicity in biodegradation tests. Several biodegradation studies exhibit the readily biodegradability of alkyl dimenthyl betaine. The revealed NOEC is greater than 90 mg/L (Schrem, 2004) and > 27 mg/L for the active ingredient. Therefore, depending on local conditions and existing concentrations, disturbances in the biodegradation process of activated sludge is not anticipated.
Additionally, a Pseudomonas putida test (Stuhlfauth, 1993) conducted according to DIN 38412, part 8 is available for Betaines, C12-14 (even numbered)-alkyldimethyl (EC No. 931-700-2). The EC10 for Pseudomonas putida is 332 mg/L (100 mg/L for active ingredient) and the revealed EC50 is greater than 2000 mg/L (> 600 mg/L for active ingredient).
The test substance can be regarded as acutely not harmful to Pseudomonas putida and inhibition of activated sludge is also not expected.
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