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Diss Factsheets
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EC number: 248-227-6 | CAS number: 27107-89-7
- 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
Sediment toxicity
Administrative data
Link to relevant study record(s)
- Endpoint:
- sediment toxicity: long-term
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Justification for type of information:
- JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACH Annex X, long-term testing to sediment organisms (required in section 9.5.1) does not need to be conducted as the hazard assessment performed during the chemical safety assessment concludes that the substance is classified for the highest environmental hazard - for both acute and chronic environmental toxicity (category 1). Hence, the performance of additional environmental toxicity tests will not impact on the hazard classification, or resultant risk management measures (which will already be very stringent), and will therefore not provide any additional benefit regarding the safe use of this chemical.
Indeed, the available data are adequate for classification and labelling purposes and for PBT assessment.
Furthermore, direct exposure of sediment will not occur from the use of MOTE and indirect exposure will be low. The assessment performed in chapter 9 of the CSR confirms this low indirect environmental exposure and an acceptable risk to aquatic organisms is demonstrated with the use of relevant risk mitigation measures. In addition in environmental monitoring data, environmental levels of octyl tins were demonstrated to be extremely low. Therefore in accordance with Annex XI of the Regulation EC 1907/2006 the study is not necessary.
Reference
Description of key information
In accordance with column 2 of REACH Annex X, long-term testing to sediment organisms (required in section 9.5.1) does not need to be conducted as the hazard assessment performed during the chemical safety assessment concludes that the substance is classified for the highest environmental hazard - for both acute and chronic environmental toxicity (category 1). Hence, the performance of additional environmental toxicity tests will not impact on the hazard classification, or resultant risk management measures (which will already be very stringent), and will therefore not provide any additional benefit regarding the safe use of this chemical.
Indeed, the available data are adequate for classification and labelling purposes and for PBT assessment.
Furthermore, direct exposure of sediment will not occur from the use of MOTE and indirect exposure will be low. The assessment performed in chapter 9 of the CSR confirms this low indirect environmental exposure and an acceptable risk to aquatic organisms is demonstrated with the use of relevant risk mitigation measures. In addition in environmental monitoring data, environmental levels of octyl tins were demonstrated to be extremely low. Therefore in accordance with Annex XI of the Regulation EC 1907/2006 the study is not necessary.
Key value for chemical safety assessment
Additional information
MOT(EHTG) is always manufactured as a mixture with DOT(EHTG). The MOT(EHTG):DOT(EHTG) mixture is added to polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) as a heat stabilizer intended to preserve the polymeric structure and properties of the resins during the final stages of fabrication into finished articles. After being blended into the PVC and CPVC resin, the stabilizers remain there throughout the subsequent processing steps.
All systems are designed and maintained to ensure that moisture is kept away from the resin compound, since the presence of water creates significant problems during processing. Therefore, losses to water during blending and melt processing are very low, as these are designed to be “dry” processes. Furthermore, water is not used on a regular basis to clean equipment, wash out vessels, etc., and no wastewater is generated. Compounded PVC and CPVC material is solid and any spillage is cleaned up by vacuum or sweeping. Once the PVC or CPVC is melt processed into a final part, most of the mono-octyltin chemicals are strongly held within the resin and are highly resistant to leaching although some leaching of monooctyltin compounds may occur from some PVC products .
During melt processing of PVC and CPVC, there is the possibility that mono-octyltins (and other ligands unspecified) can be released into the atmosphere. Measurements by Nowak (2003 cited in RPA 2002, updated 2003) of MOT released during a PVC calendering operation show the values to be 0.003% of the MOT processed being released (RPA 2002, updated 2003).
Several studies have been done to examine environmental levels of mono-octyltins and their fate. Regarding environmental fate, most PVC and CPVC articles will either be recycled or landfilled at end of life.
Some research shows that approximately 80% of organotins detected in untreated wastewater are associated with suspended solids and are removed from wastewater primarily by sedimentation and adsorption into sewage sludge (Fent 1996).
Landfill leachate may directly enter the environment. Mersiowsky et al. (2001) and Mersiowsky and Ejlertsson (1999) found that the concentration of organotins in leachate samples from sanitary landfills were found to be in the low micrograms per liter range. In addition, it is expected that most leachate would be treated at on-site water treatment facilities or released into a municipal sewer. If landfill leachate should directly enter the environment, there would be dilution of the leachate resulting in lowered environmental concentrations than were measured in the leachate.
Octyltins were detected in some sediments in rivers in southwest France that were sampled in 2001, but they were seen less frequently and generally at low concentrations (0-5 ng Sn/L). MOT was found in about half of the sediment samples at concentrations of about 1 μg MOT/kg (Bancon-Montigny et al. 2004 as cited in RPA 2005.
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.