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EC number: 200-902-6 | CAS number: 75-79-6
- 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
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
There are no test data for the substance. However a 72 EC50 value of >3.6 mg/L and NOEC of ≥3.6 mg/L (geometric mean measured concentrations) have been determined for the effects of a read-across substance, Trimethoxy(methyl)silane (CAS 1185-55-3), on growth rate of Pseudokirchnerella subcapitata. The same results expressed in terms of nominal concentrations were >120 mg/L and ≥120 mg/L respectively. It is likely that the test organisms were predominantly exposed to the hydrolysis products of the substance. A reliable result for a second read-across substance (Triethoxy(methyl)silane; CAS Number 2031-67-6) is also available but the EC50 is higher.
Key value for chemical safety assessment
Additional information
No test data for toxicity to aquatic algae and cyanobacteria are available for trichloro(methyl)silane. However a study of toxicity to algae is available for the related substance Trimethoxy(methyl)silane. Trichloro(methyl)silane (CAS 75-79-6) and Trimethoxy(methyl)silane (CAS 1185 -55 -3) both hydrolyse to methylsilanetriol. The hydrolysis half-lives of Trichloro(methyl)silane and Trimethoxy(methyl)silane indicate that, under conditions relevant to ecotoxicity assessment, both will hydrolyse to methylsilanetriol in the course of the tests. The other hydrolysis products are hydrogen chloride and methanol, respectively; the properties of these substances are well characterised. Methanol is non-toxic to the environment and it is considered unlikely that it’s presence significantly affected the results of the test performed with trimethoxy(methyl)silane. Effects of hydrogen chloride on aquatic organisms are limited to those that result from changes to pH in unbuffered media.
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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