Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Diss Factsheets
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: 205-840-3 | CAS number: 155-04-4
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Endpoint summary
Administrative data
Description of key information
Additional information
There are very limited data available on the environmental fate and behavior of ZMBT. ZMBT is an organic complex, in which MBT structure is present. The dissolution of MBT determines the hazard profile of ZMBT aqueous solution; and hence the environmental fate and behavior of MBT is used as read-across approach to support the risk assessment of ZMBT.
MBT is not readily biodegradable with a biodegradability of 2.5% observed in 14 days and also not inherently biodegradable with only 2% biodegradability observed during 35 days exposure to adapted bacterial inoculum. On the other hand MBT is also hydrolytically stable at pH 7 and ambient temperature, but it is abiotically unstable in aquatic environment in presence of atmospheric oxygen with 60% conversion to MBTS within 2 hours at pH 6.5 and in presence of light with a direct photolysis half-life in water of ca. 30 mins at 32-40°C. The main abiotic degradation products of MBT and its described metabolites (e. g. MBTS) are BT (95-16-9) and its further product as BTon (934-34-9). In the appendix A of EU-risk assessment for CBS (95-33-0), BT and BTon are reported as persistent under environmental conditions. Another described metabolite from MBT is MeSBT (615-22-5), which is also reported in EU-risk assessment as resistant both to biodegradation and photolysis. MBT is not bioaccumulative with a measured BCF of 8 at 0.01 mg/l determined on Cyprinus carpio in a flow-through system. The described metabolites of MBT are also not bioaccumulative. Simultaneously, MBT has moderate adsorption potential in soil/sediment with the adsorption coefficient (log Koc) of 2.51 – 3.55. The adsorption coefficients of the described metabolites of MBT distribute also in the same range as the one of MBT. Considering the lower water solubility of ZMBT in comparison to MBT but higher Log Pow, the adsorption potential of ZMBT is expected to be higher than MBT. However the lower log Koc of 2.51 is used to estimate PNECs for sediment and soil compartment as a worst case.
ZMBT is essentially not volatile with the Henry's law constant H lower than 1.53*10-12 Pa * m³/mole at 25°C from aquatic media according to the criteria of Thomas (1990). ZMBT has a half-life in air of 4.3 h estimated by AOPWIN v1.92 with a rate constant of 9.03 *10-11 cm3/(molecule*sec), considering an OH-concentration of 500,000 radicals/cm³. The estimated half-life in air of ZMBT is much shorter than 24 hours; and hence no potential for long-range transport of ZMBT in air is expected.
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.