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Diss Factsheets
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EC number: 202-409-1 | CAS number: 95-31-8
- 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
Although TBBS is not readily biodegradable with a biodegradability of 0 % observed in 28 days, it is abiotically unstable in aquatic environment with a hydrolysis half-life of 7.76 to 9.53 hours at pH 7.0 and 25 °C. Mercaptobenzothiazole (CAS: 149-30-4) and tert-butylamine (CAS: 75-64-9) were identified hydrolysis products. The described metabolites are also not readily biodegradable. But mercaptobenzothiazole shows also fast hydrolysis in aquatic environment.
Due to the fast hydrolysis, the BCF and adsorption coefficient of the degradation products are relevant for risk assessment of TBBS in the environment. The experimentally determined BCF of MBT is lower than 8 and the one of tert-butylamine lower than 9; and hence TBBS is considered to have very low potential for bioaccumulation. Simultaneously, MBT has moderate adsorption potential in soil/sediment with the adsorption coefficient (log Koc) of 2.51 – 3.55. Tert-butylamine however has only a low affinity to adsorption with a logKoc of 1.43. With QSAR estimation a logKoc of 2.76 was caluclated for TBBS using Kow Method.
TBBS is essentially non-volatile with the calculated Henry's law constant 0.000085 Pa m³/mol at 25 °C. The estimated half-life in air of TBBS is much shorter than 48 hours and hence no potential for long-range transport of TBBS in air is expected.
The distribution of TBBS in a "unit world" was calculated according to the Mackay fugacity model level I based on the physico-chemical properties. The main target compartment for TBBS is water of 72.65 % and sediment of 13.31 %, followed by soil of 13.16 %.
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.
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