Registration Dossier
Registration Dossier
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EC number: 204-817-5 | CAS number: 126-98-7
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
EC50 (72 h) 15.1 mg/L based on biomass (OECD 201)
NOEC (72 h) 1 mg/L based on biomass (OECD 201)
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 15.1 mg/L
- EC10 or NOEC for freshwater algae:
- 1 mg/L
Additional information
The EC50 (72 h) and NOEC (72 h) based on biomass were calculated using data collected between zero and 72 h. In contrast, EC50 and NOEC based on growth rate were derived using data collected between 24 and 72 h, which makes the values less reliable.
Adoption of a conservative approach leads to a key value NOEC of 1 mg/L but, given the availability of more robust long-term toxicity data (for Daphnia magna), it is not considered necessary to classify methacrylonitrile as Aquatic Chronic 3 in accordance with the upper limit of the concentration range given by Regulation 286/2011.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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