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Diss Factsheets
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EC number: 212-736-1 | CAS number: 865-33-8
- 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
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
- Remarks:
- differential scanning calorimetry & thermogravimetry
- Melting / freezing pt.:
- >= 359 - <= 400 °C
- Atm. press.:
- ca. 1
- Decomposition:
- yes
- Decomp. temp.:
- 384 - ca. 430 °C
- Conclusions:
- Taking into account all results and observations described in the commentay field above, the melting process begins at 359 °C. From the curve of the thermogravimetry can be deduced, that from 385 °C (and higher) the melting process is superimposed by an endothermic decomposition process. The superimposed endothermic effects end at about 390 °C. Then an exothermic process sets in (which was not finished at the endpoint of the measurements at 450 °C (DSC) and 500 °C (Thermogravimetry)).
Because this decomposition process up to 400 °C apparenty changed the identity of the substance, no boiling point can be assigned to potassium methanolate. The residue of the decomposition process can assumed to be KOH/K2O and elementary carbon. The effects at 116 °C evidently are not followed by substancial changings of the substance identity and may be caused by the evaporation of minor amounts of humidity or recrystallisation effects.
The effect at about 116 °C seems to be of minor importance. - Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Remarks:
- handbook data, not reliable
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- (assumed)
- GLP compliance:
- not specified
- Type of method:
- other: unknown
- Decomposition:
- yes
- Decomp. temp.:
- ca. 300 °C
Referenceopen allclose all
Parallel to the DSC measurement the mass loss was determined with a thermo balance during temperature rising. The residues in the crucibles were visually examined after the DSC and thermogravimetric experiment.
There was a minor endothermic effect at 116 °C accompanied by a mass loss of 0.4 %. Beginning at 358 °C the first of two strong endothermic peaks appeared in the DSC. The first peak (with a maximum at 376 °C) overlapped with the second peak (with a maximum at 385 °C). Only the second peak of the DSC was accompanied by a mass loss, which could be detected with the thermo balance. The mass loss happened in the temperature range from 385 to about 430 °C.
The consistence of the black residues found in the crucibles after the experiment indicated, that a melting process had taken place before.
Description of key information
Melting point 359 - 400 °C at ca. 1 atm. The substance decomposes starting in the range 384-ca. 430 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 359 °C
Additional information
The substance begins to melt at about 359 °C. At 385 °C an endothermic decomposition process sets in and superimposes the melting process. The effect at about 116 °C seems to be of minor importance.
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