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EC number: 910-697-1 | CAS number: -
- 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
Endpoint summary
Administrative data
Description of key information
The substance is a reaction mass of calcium fluoride, calcium sulfate and calcium carbonate.The adsorption/desorption of the substance itself cannot be determined. Therefore conducting a study is considered not appropriate.
Additional information
The substance is a reaction mass of calcium fluoride, calcium sulfate and calcium carbonate.The adsorption/desorption of the substance itself can not be determined. Therefore conducting a study is considered not appropriate.Only adsorption/desorption of the individual ions can be determined. The ions (like calcium, fluoride sulfate, carbonate) are naturally present in the environment and therefore a study does not seem appropriate. Soil biodegradation studies with reaction mass of calcium fluoride, calcium sulfate and calcium carbonate are not possible due to analytical difficulties, the solubility characteristics in water of its constituents and their behaviour in soil (eg: calcification).
No experimental determination of the adsorption coefficient of the test material is considered to be possible by Method 106 of the OECD Guidelines for Testing of Chemicals, 21 January 2000, for the following reasons: The absence of a suitable substance specific method of analysis that would allow distinction between any calcium fortified into the soil/solution system as calcium difluoride and/or calcium sulfate and/or calcium carbonate sulfate and that present due to the guideline requirement to use 0.01 M calcium chloride solution as the aqueous phase in each soil/solution system. If 0.01 M calcium chloride was excluded from each test system, then continued interference would be anticipated due to contributions from calcium sulfate or calcium difluoride or calcium carbonate and other calcium containing salts/compounds present as a naturally occurring mineral fraction of the soils present in each soil/solution system.
Calcium fluoride will hydrolyse in the environment only to a very limited extent due to its low water solubility; liberated fluoride ions will react to form other fluorine-containing compounds. The behaviour of fluoride in water is dependent on pH and mineral content. Fluoride is deposited to sediment as insoluble complexes and is essentially immobile in soil due to its incorporation into insoluble complexes. Calcium is ubiquitous in the environment and is present as a number of mineral forms with limited mobility.
The accumulation and mobility of calcium sulfate in soils has been documented in the available literature. Calcium sulfate has a low potential for adsorption to soil. The sulfate ion is sufficiently mobile to penetrate subsoil readily. Calcium accompanies sulfate into the subsoil (Shainberg et al. 1989). The rate at which soluble sulfates are gradually leached away is dependent upon the water supply. Calcium sulfate also accumulates in humid regions, the upper layers of soil and rock are kept thoroughly leached, and as fast as they are formed the soluble products are removed in the drainage water. In semi-arid regions, the soils are not fully leached and soluble salts tend to accumulate. The organic carbon content of the soils is not anticipated to play a significant role in the mobility of simple inorganic salts such as calcium sulfate and therefore the actual test endpoint, that of an organic carbon normalised adsorption coefficient (Koc) is probably not actually valid/relevant for this type of substance. For the calcium content at least, pH, water potential and carbon dioxide partial pressure amongst others will be controlling factors.
Calcium carbonate has a propensity to leach through soil if water is applied, i.e. it does have some mobility through soil, providing sufficient water is present. As it moves downwards into layers where the water content is low, the leaching will stop.
On this basis, reaction mass of calcium fluoride, calcium sulfate and calcium carbonate does not have a high potential for adsorption to soil.
References: Shainberg I, Sumner ME, Miller WP, Farina MPW, Pavan MA and Fey MV (1989) Use of gypsum on soils. Advanced Soil Sci., 9: 1-111
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