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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 219-660-8 | CAS number: 2492-26-4
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The acute toxicity of MBT to aquatic invertebrates (Dapnia magna) was tested according to OECD TG 202 "Daphnia sp. Acute Immobilisation test". After 48 hours of exposure an EC50 of 0.71 mg/L was obtained (MITI, 1999). The described metabolites of MBT are less toxic to aquatic invertebrates than MBT itself.
Key value for chemical safety assessment
Additional information
SMBT is an organic salt of strong base NaOH and weak acid of MBT and it is solely marketed as aqueous solution. The presence of MBT determines the hazard profile of SMBT aqueous solution; and hence the read-across approach is used to support the risk assessment of SMBT. The effect concentration of SMBT aqueous solution as test substance is higher than the one of MBT. Therefore the effect concentration of MBT is taken as a worst case consideration for the risk assessment of SMBT.
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.
