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Diss Factsheets
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EC number: 457-670-6 | CAS number: 157859-20-6
- 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
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Adsorption/desorption:
Parent substance: Low potential for adsorption due to very rapid hydrolysis in water
Tris(1-methylethyl)silanol: log Koc = 2.1 (QSAR
Key value for chemical safety assessment
Additional information
The substance hydrolyses to tris(1-methylethyl)silanol and acrylic acid.
A log Koc value of 2.1 at 20 - 25°C was obtained for the silanol hydrolysis product, tris(1-methylethyl)silanol using a validated QSAR method. The result is considered to be reliable.
Adsorption and desorption of acrylic acid was reported in EU Risk Assessment Report (ECB 2002). The adsorption and desorption of acrylic acid were observed using five different soil types. The adsorption phase has a Kp soil ranging from 0.28 - 0.63 l/kg, more wide scattering of the Kp values for three desorption phases were observed with reported Kp of 0.38 - 3.85 l/kg. The adsorption and desorption of acrylic acid proved to be independent from organic matter contents of the soil. It was therefore assumed that the adsorption behaviour of the anionic acrylic acid primarily depends on the inorganic fraction of the different soils and a uniform value of 1.1 l/kg for all partition coefficients (Kp soil, Kp sediment, Kp susp and Kp sludge) was used. Kocvalues of 6 – 137 are reported in the ECHA dossier for acrylic acid (citing Chemosphere 40: 29-38, 2000). Koc (for the non-ionised form of acrylic acid) is predicted to be <10 l/kg by both MCI and log Kow-based QSAR methods (KOCWIN).
Reference:
ECB (2002). European Union Risk Assessment Report acrylic acid CAS No: 79-10-7 EINECS No: 201-177-9 Risk Assessment, PL-1 Vol 28, 2002.
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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