Registration Dossier
Registration Dossier
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EC number: 261-448-2 | CAS number: 58798-47-3
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The inhibition of algal growth of Basic Yellow 28 methyl sulfate was EC50 biomass: 0.14 mg/L and EC50 growth rate: 0.21 mg/L without taking into account inhibition of growth due to the UV absorption by the dyestuff.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 0.21 mg/L
Additional information
To investigate potential harmful effects of the test item on aquatic algae or cyanobacteria, an algal growth inhibition test was performed. The test was performed with four test concentrations between 0.032 mg/L and 1 mg/L. With regard to biomass and growth rate, EC50 (72h) values of 0.14 mg/L and 0.21 mg/L were determined, respectively. The ErC10 (72 h) was determined to be 0.02 mg/L,
without taking into account inhibition of growth due to the UV absorption by the dyestuff.Duration |
Endpoint |
Effect conc. |
Nominal/Measured |
Conc. based on |
Basis for effect |
Remarks (e.g. 95% CL) |
72 h |
EC50 |
0.14 mg/L |
nominal |
test mat. |
biomass |
CL: 0.02-0.057 |
72 h |
EC10 |
0.03 mg/L |
nominal |
test mat. |
biomass |
CL: 0-0.09 |
72 h |
EC90 |
0.53 mg/L |
nominal |
test mat. |
biomass |
CL: 0.21-1150 |
72 h |
EC50 |
0.21 mg/L |
nominal |
test mat. |
growth rate |
|
| 72 h | EC50 | 0.02 mg/L | nominal | test mat. | growth rate |
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