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EC number: 243-957-1 | CAS number: 20667-12-3
- 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:
- transformation / dissolution of metals and inorganic metal compounds
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media
- Deviations:
- not specified
- Principles of method if other than guideline:
- Test were performed at pH 6 and pH 8, with sample loading of 1, 10 and 100 mg/L for a 7 day acute test. A 28 day test was carried out at a sample loading of 1 mg/L at both pHs.
- GLP compliance:
- not specified
- Type of method:
- other: Transformation / dissolution
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 52.51 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 7 d
- Test conditions:
- pH 6
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 62.03 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 28 d
- Test conditions:
- pH 6
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 40.51 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 10 mg/L
- Incubation duration:
- 7 d
- Test conditions:
- pH 6
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 30 257 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 100 mg/L
- Incubation duration:
- 7 d
- Test conditions:
- pH 6
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 19.13 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 7 d
- Test conditions:
- pH 8
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 24.8 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 28 d
- Test conditions:
- pH 8
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 27.77 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 10 mg/L
- Incubation duration:
- 7 d
- Test conditions:
- pH 8
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 26.04 µg/L
- Element analysed:
- silver
- Loading of aqueous phase:
- 100 mg/L
- Incubation duration:
- 7 d
- Test conditions:
- pH 8
- Conclusions:
- The transformation/dissolution test gave results of 52.51 µg/L after 7 days and 62.03 µg/L after 28 days at a sample loading of 1 mg/L.
- Executive summary:
The Transformation/Dissolution of Ag2O was determined following OECD guideline 29 after seven (loading rates of 1, 10 and 100 mg/L) and 28 days (loading rate of 1 mg/L) in OECD media at both pH 6 and pH 8. The transformation/dissolution test gave results of 52.51 µg/L after 7 days and 62.03 µg/L after 28 days at a sample loading of 1 mg/L.
- Endpoint:
- water solubility
- Type of information:
- other: Handbook data
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- secondary literature, online database with authoritative values
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable: secondary literature, online database with authoritative values
- GLP compliance:
- no
- Type of method:
- other: no data
- Water solubility:
- ca. 46.4 mg/L
- Temp.:
- 25 °C
- Remarks on result:
- other: pH not given in reference. Re-calculated to mg/L from original figure of 0.2 mmol/L (molecular mass of Ag2O = 231.74).
- Details on results:
- no data
- Conclusions:
- Interpretation of results: slightly soluble (0.1-100 mg/L)
According to the value of 46.4 mg/L (25°C) disilver oxide is slightly soluble in water. - Endpoint:
- water solubility
- Type of information:
- other: Secondary literature
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- secondary literature, online database with authoritative values
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable: secondary literature, online database with authoritative values
- GLP compliance:
- no
- Type of method:
- other: no data
- Water solubility:
- 1.6 mg/L
- Temp.:
- 20 °C
- Remarks on result:
- other: pH not given in reference
- Details on results:
- no data
- Conclusions:
- Interpretation of results: slightly soluble (0.1-100 mg/L)
According to the value of 1.6 mg/L (20°C) disilver oxide is slightly soluble in water.
Referenceopen allclose all
Description of key information
According to reliable secondary literature, disilver oxide is slighly soluble in water (1.6 mg/L at 20°C, Gestis; ca. 46.4 mg/L at 25°C, Holleman-Wiberg). However, water solubility testing is not appropriate for complex metal and sparingly soluble metals and metal compounds. Transformation dissolution testing was therefore conducted for disilver oxide and resulted in a dissolution of 52.51 µg/L after 7 days and 62.03 µg/L after 28 days at a sample loading of 1 mg/L.
Key value for chemical safety assessment
- Water solubility:
- 62.03 µg/L
- at the temperature of:
- 20 °C
Additional information
The transformation dissolution study by CIMM (2009) reported dissolved disilver oxide concentration of 62.03 µg/L after 28 days at a sample loading of 1 mg/L.
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