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EC number: 247-728-7 | CAS number: 26479-35-6
- 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
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with Column 2 of Annex VII of Regulation (EC) No. 1907.2006, if the melting point is between 200 deg C and 300 deg C, a limit value based on measurement or a recognised calculation method is sufficient. In a melting/boiling point study performed according to the capillary method (SOP 013.03 Issue No, 1 issued Nov 2009), potassium allophonate sublimed at 298.3 deg C and, therefore, the melting/freezing temperature cannot be technically determined. However, given the high stability of potassium allophonate up to this temperature, the vapour pressure of potassium allophonate is low and calculation of a limit value is still appropriate. MPBVP v1.43, found in EPIWIN v4.10, estimates at vapour pressure of 1.09E-11 mm Hg (1.46E-09 Pa) at 25 deg C, indicating that potassium allophonate has a negligible volatility.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
Since potassium allophonate underwent sublimation at 298.3 deg C prior to the onset of melting, it is appropriate to estimate a limit value of the vapour pressure using accepted methods. MPBVP v1.43, found in EPIWIN v4.10 (U.S. EPA, 2013), was used to estimate the vapour pressure of potassium allophonate. An experimentally-determined log octanol water coefficient of ≤ -1.08 and a melting/freezing point value of 298.3 deg C (experimentally-determined sublimation temperature) were manually entered into the model as inputs. All parameters used in the calculations were the default values found in EPIWIN. The model estimates a vapour pressure of 1.09E-11 mm Hg (1.46E-09 Pa) at 25 deg C, indicating that this substance is highly non-volatile. This result is expected given the high capacity for hydrogen bonding and the ionic nature of potassium allophonate at environmentally-relevant pH.
Reference:
United States Environmental Protection Agency (U.S. EPA). 2013. Estimation Programs Interface Suite™ for Microsoft® Windows, v 4.10. United States Environmental Protection Agency, Washington DC, USA.
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