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Diss Factsheets
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EC number: 215-687-4 | CAS number: 1344-09-8
- 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 fish
Administrative data
Link to relevant study record(s)
- Endpoint:
- fish early-life stage toxicity
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Reference
Description of key information
The chemical safety assessment according to Annex I of Regulation (EC) No 1907/2006 does not indicate the need to investigate further the long-term toxicity to fish.
Key value for chemical safety assessment
Additional information
According to Regulation (EC) No. 1907/2006, Annex IX, Column 2, 9.1.6, long-term toxicity testing shall be proposed by the registrant if the chemical safety assessment according to Annex I indicates the need to investigate further the effects on aquatic organisms. Experimental data on the chronic aquatic toxicity of soluble silicates are not available. However, soluble silicates have been demonstrated to be not acutely toxic to aquatic organisms. Short-term toxicity tests with fish, aquatic invertebrates, and algae resulted in effect concentrations (EC50 and LC50) above 100 mg/L. Furthermore, soluble silicates have no potential to bioaccumulate in organisms nor is the substance classified for any human health effects which are subject to “T” classification according to REACh legislation. Additionally, dissolved silica is indistinguishable from naturally dissolved silica, which is ubiquitous in the environment. Depending on pH values, reaction with naturally occurring dissolved polyvalent metals such as Ca, Mg, Fe, and Al, will result in insoluble silicates or amorphous silica being formed. These products occur in abundance in natural soils and rocks. In fact, silica is the second most abundant element on earth (HERA, 2005; OECD SIDS, 2004). Silicon is also the primary constituent of the frustules of diatoms and is taken up by diatoms from the ambient water and incorporated into their skeleton (HERA, 2005). Due to the natural adaptation of organisms to silicon, it can be assumed that the additional input of anthropogenic soluble silicates will not lead to an increased hazard potential for aquatic organisms. Chronic aquatic toxicity is therefore not anticipated. In addition, according to the Guidance on information requirements and chemical safety assessment Chapter R.7b: Endpoint specific guidance, R.7.8.5.3 (ECHA, 2014), long-term testing of fish should only be conducted if it represents the most sensitive taxonomic group. The available short-term toxicity studies on fish and Daphnia determined no adverse effect on any of the trophic levels. The results indicate no higher sensitivity of fish compared to Daphnia. Overall, according to REACh legislation, Annex IX, 9.1, column 2, studies on the long-term toxicity to fish do not need to be conducted, since the chemical safety assessment showed that soluble silicates are not PBT or vPvB candidates and natural compounds of silicon are ubiquitous in the environment. Short-term aquatic toxicity testing showed no adverse effects in any species below 100 mg/L, which is far in excess of natural occurring concentrations. Hence, due to animal welfare reasons and to avoid unnecessary vertebrate tests, long-term toxicity testing with fish is waived.
References:
Human & Environmental Risk Assessment on ingredients of European household cleaning products (HERA), 2005: Soluble Silicates – draft- (CAS No.: 1344-09-8, 6834-92-0, 10213-79-3, 13517-24-3, 1312-76-1), p 1 – 64.
OECD SIDS, 2004: SIDS initial assessment report for SIAM 18 – soluble silicates, p. 1 – 43.
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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