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EC number: 205-840-3 | CAS number: 155-04-4
ZMBT is an organic complex with where the relation of Zn to Sulfur bridge is considered to be ionic. Thus the MBT structure is present in ZMBT. Meanwhile MBT is often found as impurity in ZMBT with variable percentage. The dissolution of MBT determines the hazard profile of ZMBT aqueous solution; and hence a read-across approach from MBT is used to support the risk assessment of ZMBT as a worst-case.
MBT being released into the waste water and the atmosphere undergo different degradation reactions. The known reaction pathways and relevant metabolites of MBT are already described in the appendix A of the EU-Risk Assessment for CBS from 2008.These described metabolites are MBTS (CAS: 120-78-5), BT (CAS: 95-16-9), BTon (CAS: 934-34-9), MeSBT (CAS: 615-22-5).All these compounds are detected in waste water and environmental compartments; therefore they are included into the MBT risk assessment and PBT/vPvB assessment.
The assessment of PBT and vPvB is performed by comparison of the relevant intrinsic properties of MBT and its described metabolites with the criteria of the REACH regulation (Annex XIII).
PBT and vPvB criteria and the corresponding properties of MBT and its described metabolites
Due to the B and T criteria are not fulfilled; MBT is neither PBT nor a vPvB substance. Based on the read across approach, ZMBT is also not a PBT or vPvB substance.
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.
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