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EC number: 250-807-9 | CAS number: 31795-24-1
- 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
Long-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
No study of long-term invertebrates is available for the registration substance. A reliable study with a suitable read-across substance (trichloroethylsilane) is available. A 21-day NOEC value of ≥100 mg/l (nominal, highest concentration tested) (≥10 mg/l mean measured concentration) has been determined for effects on survival and reproduction of Daphnia magna. When expressed in terms of the silanol hydrolysis product, ethylsilanetriol, the NOEC value is equivalent to ≥45 mg/l based on measured recoveries.
Key value for chemical safety assessment
Additional information
There are no reliable long-term invertebrate toxicity data available for potassium methylsilanetriolate (CAS 31795-24-1), therefore good quality data for an appropriate structural analogue, trichloro(ethyl)silane (CAS 115-21-9), have been read across. Both substances form silanetriols in solution, methylsilanetriol and ethylsilanetriol, respectively. The other (hydrolysis) products are potassium and chlorides, respectively, and are not considered likely to contribute to effects observed in studies.
A 21-d NOEC of ≥100 mg/l (nominal, highest concentration tested) has been determined for the effects of trichloro(ethyl)silane (CAS 115-21-9) on reproduction and survival of Daphnia magna. In view of the very rapid hydrolysis rate of the tested substance, it is likely that the test organisms were exposed primarily to the hydrolysis products of the tested substance. TOC analysis of filtered media confirmed the presence of 10 mg DOC/l, which in terms of the silanol means 45 mg/l. The NOEC is therefore equivalent to ≥45 mg/l when expressed in terms of ethylsilanetriol based on measured recoveries.
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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