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Diss Factsheets
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EC number: 242-262-0 | CAS number: 18379-25-4
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Biodegradation in water, screening tests: no significant biodegradation expected
Key value for chemical safety assessment
Additional information
No data are available for the submission substance, trichloro(2,4,4 -trimethylpentyl)silane. However, trichloro(2,4,4 -trimethylpentyl)silane hydrolyses very rapidly in contact with water to give (2,4,4 -trimethylpentyl)silanetriol and hydrogen chloride.
A reliable study conducted according to an appropriate test protocol (OECD 310), and in compliance with GLP is available for the related substance triethoxy(2,4,4 -trimethylpentyl)silane. It is considered appropriate to read across the ready biodegradation result for triethoxy(2,4,4 -trimethylpentyl)silane because the hydrolysis half-life (22 hrs, predicted) indicates that, under conditions relevant to ready biodegradation assessment, it will hydrolyse to (2,4,4 -trimethylpentyl)silanetriol.
This is selected as the key study. The results from this study are likely to represent biodegradation of ethanol, which is expected to biodegrade rapidly, rather than of (2,4,4 -trimethylpentyl)silanetriol. Therefore, the biodegradation of trichloro(2,4,4 -trimethylpentyl)silane is expected to be insignificant.
This is supported by evidence that within a category of small molecule silicon-dominated organosilicon compounds, without reactive functional groups in the side chain, there is no evidence of any significant biodegradation in ready biodegradation tests (Data gap filling report for ready biodegradability of silicon-dominated substances PFA.151.004.022A).
Biodegradation is not relevant for hydrogen chloride as it is inorganic.
Note: the biodegradation rate of 13% for the read-across substance, triethoxy(2,4,4 -trimethylpentyl)silane, is lower than expected based on the chemical structure. This is likely to be due to the fact that the concentration of test substance used in the test was significantly above the water solubility.
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