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EC number: 241-931-4 | CAS number: 18023-33-1
- 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
Tri(isopropoxy)(vinyl)silane is a liquid at standard temperature and pressure, with a measured melting point of <-65°C and a measured boiling point of 176°C. It has a predicted density of 0.9 g/cm3 at 20°C and a predicted vapour pressure of 64 Pa at 25°C.
The substance is classified for flammability according to Regulation (EC) No 1272/2008 on the basis of a measured flash point of 43.5°C and a measured boiling point of 176°C. It has a measured auto-ignition temperature of 246°C, and it is not explosive and not oxidising on the basis of chemical structure.
In contact with water, the submission substance reacts rapidly (predicted half-life of 0.3 hours at pH 4, 7 hours at pH 7 and 0.1 hours at pH 9 and 20-25°C) to produce vinylsilanetriol and isopropanol according to the following equation:
C11H24SiO3+ 3H2O → C2H6SiO3 + 3C3H8O
Therefore, requirements for testing of water-based physicochemical properties for the substance are waived on the basis of instability in water. The properties of the hydrolysis products vinylsilanetriol and isopropanol are assessed instead.
However, the key physicochemical properties of the submission substance have been predicted using validated QSAR estimation methods. The substance has a predicted water solubility value of 130 mg/l at 20°C and a predicted log Kow value of 3.8 at 20°C.
The hydrolysis of the submission substance produces vinylsilanetriol and 3 molecules of isopropanol.
Isopropanol has a reported water solubility of 1.0E+06 mg/L (Riddick et al 1986), low log Kow value of 0.05 (Hansch et al (1995)) and a vapour pressure of 6053 Pa at Pa at 25°C (Daubert and Danner (1985).
The saturation concentration in water of the silanol hydrolysis product, vinylsilanetriol is limited by condensation reactions that can occur over time at loadings above approximately 1000 mg/L. However, it is very hydrophilic (calculated solubility is 1.0E+06 mg/l at 20°C using a QSAR method) and has a low log Kow (-2.0, predicted).
The silanol hydrolysis product is not expected to be surface active and it is much less volatile than the parent substance (vapour pressure = 0.017 Pa at 25°C, predicted).
References:
Daubert and Danner (1985). Daubert, T.E., R.P. Danner. Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, D.C.: Taylor and Francis, 1989.
Hansch et al., (1995). Hansch C, Leo A and Hoekman D. Exploring QSAR. Hydrophobic, Electronic, and Steric Constants. ACS Professional Reference Book. Washington, DC: American Chemical Society.
Riddick, J., Bunger, W.B., Sakano, T.K. (1986). Organic Solvents: Physical Properties and Method of Purification. 4th Edition, John Wiley & Sons, New York
Additional information
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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