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EC number: 237-748-4 | CAS number: 13967-50-5
- 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
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
After 48 hours, the Kd values of 125.04, 287.62 and 294.47 were determined for Soil 2.3, 2.4 and 6S, respectively. The Koc values of 18663.4, 14526.5 and 17021.2 were determined for Soil 2.3, 2.4 and 6S, respectively, after 48 hours. An equivalent Koc value of 16648.7 was calculated from the three soils, and was then used to calculate partition coefficients for the substance to other environmental matrices in addition to soil (e.g. suspended sediment). The equivalent Koc value results in a Kd value of 333 for standard soil with 2 % organic carbon.
Key value for chemical safety assessment
- Koc at 20 °C:
- 16 648.7
Additional information
In order to determine the adsorption/desorption of potassium dicyanoaurate a limited partitioning study with three soils was performed according to OECD 106 (Fraunhofer 2016). The approach was considered adequate for the information requirements.
Based on the results, the equilibrium time for potassium dicyanoaurate was visually reached for soil 2.3 after 16 h and for soil 2.4 and 6S after 48 h. At equilibrium time the Koc values of 16144.7, 14526.5 and 17021.2 were determined for Soil 2.3, 2.4 and 6S, respectively. The Kd values of 108.17, 287.62 and 294.47 were determined for Soil 2.3, 2.4 and 6S, respectively.
Whilst in the case of some of the soils equilibrium was considered to have been reached before 48 hours the results which have been used for the derivation of the PNEC values which are calculated by equilibrium partitioning have all used the value calculated after 48 hours for consistency. In the case of tests where equilibrium was reached earlier the result will not be significantly different between the time at which equilibrium was first reached and after 48 hours.
After 48 hours, the Koc values of 18663.4, 14526.5 and 17021.2 were determined for Soil 2.3, 2.4 and 6S, respectively. The Kd values of 125.04, 287.62 and 294.47 were determined for Soil 2.3, 2.4 and 6S, respectively, after 48 h. An equivalent Koc value of 16648.7 was calculated from the three soils, and was then used to calculate partition coefficients for the substance to other environmental matrices in addition to soil (e.g. suspended sediment). The equivalent Koc value results in a Kd value of 333 for standard soil with 2 % organic carbon and 1664.9 for suspended sediment with 10 % organic carbon.
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