Registration Dossier
Registration Dossier
Diss Factsheets
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EC number: 211-656-4 | CAS number: 681-84-5
- 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
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
The calculated HLC for the hydrolysis product methanol is 0.3 Pa.m3.mol-1 at 12°C
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 0.3
- at the temperature of:
- 12 °C
Additional information
Tetramethyl orthosilicate hydrolyses rapidly (t1/2 = < 1 h at pH 7and 25°C) to (poly)silicic acid and methanol. (Poly)silicic acid is an inorganic substance with a negligible vapour pressure, which enters natural biogeochemical cycles for silicon. Therefore, volatilisation from water is not a relevant process. Methanol is expected to biodegrade fast. The HLC for ethanol can be estimated from the ratio of the vapour pressure (VP) to the water solubility (WS). HLC = (VP x MW)/WS where MW is molecular weight. The calculated HLC value for methanol at environmental temperature (12°C) is 0.3 Pa.m3.mol-1 (taken from EUSES 2.1.2). This indicates some potential to evaporate from water.
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