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Diss Factsheets
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EC number: 930-930-0 | 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
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 07 June 2021 - 11 June 2021
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Test method according to OECD Guideline 105.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- GLP compliance:
- no
- Remarks:
- non-GLP study but conducted according to OECD TG 105
- Type of method:
- flask method
- Key result
- Water solubility:
- > 100 - <= 1 000 mg/L
- Conc. based on:
- test mat.
- Incubation duration:
- 96 h
- Temp.:
- 20 °C
- pH:
- >= 11.2 - <= 12.2
- Details on results:
- Due to the nature of the test item, an exact water solubility value cannot be determined. From the calcium, pH and H2O2 measurements, the solubility of the test item was estimated to be between 100 and 1000 mg/L.
The pH were relatively stable over time and was proportional to the amount of Sample in each flask. The H2O2 was relatively stable for 100 mg/L and 1000 mg/L, with the flask containing 10000 mg/L showing a sharp decline after 24 hours. Calcium completely dissolved in the flask prepared with 100 mg/L, as the calcium concentration remained relatively unchanged at each time point. The flasks with greater amounts of CaO2 showed increasing amounts of calcium over time at slightly different rates. These observations indicate that saturation of calcium peroxide had been achieved in these flasks, with the increases in calcium concentration being equilibrium-driven owing to degradation of hydrogen peroxide. - Conclusions:
- The solubility of the test item was estimated to be between 100 and 1000 mg/L in a test perfomed according to OECD TG 105.
- Executive summary:
The water solubility test was conducted with the reaction mass of calcium dihydroxide and calcium peroxide in accordance with OECD TG 105 following the flask method. Three mixtures of water and the test substance (100, 1000 and 10000 mg/L) were stirred for 24, 48 and 96h, and were centrifuged to remove any undissolved material. An exact water solubility value cannot be determined by measurement of calcium peroxide due to its reactivity when brought into contact with water. The solubility was determined from measurements of pH, hydrogen peroxide, and calcium by inductively coupled plasma optical emission spectroscopy (ICP-OES). The solubility of the test item was estimated to be between 100 and 1000 mg/L.
Reference
Table 1. Data collected from supernatant samples
Flask contents | Time point (hours) | pH | H2O2 (mg/L) | Calcium (g/L) |
100 mg/L | 24 | 11.2 | 15.6 | 0.043 |
48 | 11.4 | 15.3 | 0.044 | |
96 | 11.2 | 13.6 | 0.044 | |
1000 mg/L | 24 | 11.6 | 6.63 | 0.109 |
48 | 11.8 | 7.80 | 0.132 | |
96 | 11.7 | 6.69 | 0.174 | |
10000 mg/L | 24 | 12.1 | 27.2 | 0.378 |
48 | 12.2 | 6.56 | 0.462 | |
96 | 12.2 | 10.2 | 0.562 |
Description of key information
Key study: Test method OECD 105. The solubility of the test item was estimated to be between 100 and 1000 mg/L.
Key value for chemical safety assessment
- Water solubility:
- 100 mg/L
- at the temperature of:
- 20 °C
Additional information
The substance is composed of calcium hydroxide and calcium peroxide. Calcium hydroxyde dissociates in calcium ion and hydroxyl ions. Calcium peroxide hydrolyses into calcium hydroxide and hydrogen peroxide. The solubility was determined from measurements of pH, hydrogen peroxide, and calcium.
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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