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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 478-900-1 | CAS number: 6156-18-9
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
2,2-bis(methylthio) propane (BMTP) was found to be harmful to aquatic algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 41 mg/L
- EC10 or NOEC for freshwater algae:
- 20 mg/L
Additional information
Acute toxicity of 2,2-bis(methylthio) propane (BMTP) to Pseudokirchnerella subcapitata has been investigated through OECD Guideline 201 and according to GLP requirements (Gancet, 2007). The algae were exposed for 72 hours at different nominal concentrations of 0, 10, 17.8, 31.6, 56.2 and 100 mg/L. The EC50 - 72h and EC10 -72h values for growth rate were 41 and 20 mg/L, respectively. Since the initial measured concentrations in non-inoculated flasks were not found to be equivalent (>80%) to the nominal concentrations and since final measured concentrations were found to be equivalent (>80%) to initial measured concentrations, calculation of effective concentrations EC50and EC10 were performed using initial measured concentrations. All the validity criteria were fulfilled.
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.
