Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
ErC50 (72h) > 100 mg/l (loading rate)
NOEC (72h) = 56 mg/l (loading rate) based on growth rate inhibition
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 56 mg/L
Additional information
The effects of the test item on the growth of Pseudokirchneriella subcapitata was evaluated over a period of 72 hours according to OECD 201 Guideline. Test solutions were prepared individually by water-accommodated fractions (WAF) approach according to OECD monograph No. 23. Test item quantification was performed according to a validated analytical method at 0, 24, 48 and 72 hours.
The effects of the test material by water-accommodated fractions to OECD test medium at the nominal loading rates of 10; 18; 31; 56 and 100 mg test item/l to Pseudokirchneriella subcapitata were investigated under laboratory conditions.
Based on growth rate and on loading rates, the NOEC (72h) was 56 mg test item/l, the LOEC (72h) was 100 mg test item/l and the EC50 (72h) was calculated to be > 100 mg test item/l.
Based on yield rate and on loading rates, the NOEC (72h) was 56 mg test item/l, the LOEC (72h) was 100 mg test item/l and the EC50 (72h) was calculated to be 79.4 (9 5% confidence limits: 65.03– 117.85 mg test item/l).
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