Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 939-200-6 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 72-hour NOEC for growth rate was found to be 8.7 mg/L and the ErC50 was found to be 740 mg/L
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 740 mg/L
- EC10 or NOEC for freshwater algae:
- 8.7 mg/L
Additional information
An OECD 201 algal inhibition test was conducted with the test substance sodium isobutyrate solution. The test was static with a test period of 72 hours. Pseudokirchneriella subcapitata cultures were exposed to the test substance at nominal test concentrations of 8.7, 22.5, 55.4, 138, 346, and 865 mg/L. Six replicates were used for the controls and three for the test solutions. Test vessels were 250 mL glass E-bottles with 100mL of solution, incubated on a shaking-table with approximately 100 µE m-2 s-1 continuous illumination and a temperature of 21-24 ±2oC. The total incubation period was 72 hours with sampling at 0, 24, 48, and 72 hours.
The 72-hour NOEC for growth rate was determined to be 8.7 mg/L, while the ErC50 was determined to be 740 mg/L.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
