Registration Dossier
Registration Dossier
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EC number: 201-627-4 | CAS number: 85-73-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The no observed effect concentration (NOEC) value of phthalylsulfathiazole in green algae (Pseudokirchnerella subcapitata) in a 72 hr study on growth effect was estimated to be 2.589638 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 19.334 mg/L
- EC10 or NOEC for freshwater algae:
- 2.59 mg/L
Additional information
The no observed effect concentration (NOEC) value of phthalylsulfathiazole in green algae (Pseudokirchnerella subcapitata) in a 72 hr study on growth effect was estimated to be 2.589638 mg/L. It is concluded that phthalylsulfathiazole exhibit short term toxicity to green algae (Pseudokirchnerella subcapitata) in category 3.
Sr no |
Endpoint | Value | Unit | Species |
| 1 | NOEC | 2.589638 | mg/l | Pseudokirchnerella subcapitata |
| 2 | EC50 | 19.3344 | mg/l | Pseudokirchnerella subcapitata |
| 3 | EC50 | 14.59537 | mg/l | Pseudokirchnerella subcapitata |
Based on the above the endpoint values and considering the CLP Criteria for aquatic classification it can be concluded that the substance phthalylsulfathiazole exhibit short term toxicity to aquatic algae (Pseudokirchnerella subcapitata) in category 3
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