Registration Dossier
Registration Dossier
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EC number: 939-682-8 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
ErC50 (72 h) = 1.7 mg a.i./L (measured) and NOErC (72 h) = 0.38 mg a.i./L (measured) for Pseudokirchneriella subcapitata (OECD 201).
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 1.7 mg/L
- EC10 or NOEC for freshwater algae:
- 0.38 mg/L
Additional information
As no algae study is available for assessing the toxicity of the substance, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 Grouping of substances, a read-across to the structurally related Alkyl Dimethyl Betaine (EC-No. 931-700-2) was applied. The read across is justified due to the structural similarity of the analogue substances and similar physico-chemical properties resulting in a similar environmental fate and ecotoxicity profile. Further justification is given in the analogue justification attached to section 13 in IUCLID.
For EC-No. 931-700-2 a GLP-study was performed according to OECD guideline 201. Based on growth rate an EC50 (72 h) of 1.7 mg a.i./L (measuredl) for Pseudokirchneriella subcapitata was determined. The corresponding NOEC (72 h) was 0.38 mg a.i./L (measured) (Hutchinson, 2010).
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