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EC number: 603-073-2 | CAS number: 12549-23-4
- 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
- Study period:
- 24.5.-11.9.2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- A differential scanning calorimetry method compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995 was used. The study is GLP compliant.
- Reason / purpose for cross-reference:
- reference to other 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)
- Remarks:
- Certificate included in the study report.
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry
- Melting / freezing pt.:
- > 450 °C
- Atm. press.:
- 1 atm
- Decomposition:
- yes
- Remarks:
- According to studies performed by J. Lehto, S. Haukka, P. Koskinen and M. Blomberg the substance starts decomposing at 230 °C.
- Decomp. temp.:
- > 230 - < 300 °C
- Conclusions:
- The melting point study determined that the substance does not melt at temperatures below 450 °C. Visually, the samples did not change during the study. A supporting thermal decomposition study performed by J. Lehto et al. (1990) suggests that the substance starts to decompose at 230 °C. At 300 °C the substance has completely decomposed.
- Executive summary:
The melting point was determined using differential scanning calorimetry in accordance with EU Method A.1 and OECD Guideline 102. According to the study, the substance does not melt at temperatures below 450 °C. According to a supporting study by J. Lehto et al. (1990) the substance starts to decompose at 230 °C. At 300 °C the substance has completely decomposed.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- other: The results from the decomposition study performed by J. Lehto, S. Haukka, P. Koskinen and M. Blomberg were published in the noted journal Thermochimica Acta in 1990. The article does not refer to any standard methods.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The test item was synthesized in the laboratory and the composition of the product was determined by atomic absorption spectrophotometry from samples dissolved in boiling concentrated sulphuric acid. The water content was calculated from the weight loss after heating the samples at 170 Celsius.
The thermograms (TG, DTG, DTA and EGD) were determined using a thermobalance.
The heated samples were analysed with X-ray diffraction. The samples were heated in an oven and the temperature was determined with a chromel-alumel thermocouple. The annealings were carried out in porcelain (< 650 degrees Celsius) and platinum crucibles (900 degrees Celsius). - GLP compliance:
- not specified
- Type of method:
- thermal analysis
- Decomposition:
- yes
- Decomp. temp.:
- > 230 - < 300 °C
- Remarks on result:
- other: The decomposition begins at 230 Celsius. At approximately 300 Celsius all the product has decomposed. The study results show that the decomposition products themselves decompose as the temperature is gradually increased to above 900 Celsius.
- Conclusions:
- Potassium cobalt hexacyanoferrate(II) has been shown to decompose before melting. The decomposition begins at 230 ºC and proceeds gradually as the temperature is raised until it has completely decomposed at 300 ºC.
Referenceopen allclose all
No evidence of melting below 450 °C (723 K). The broad endotherms from approximately 40 to 250 °C indicate a gradual loss of a volatile component, most likely water.
The determination indicated that there were four different weight-loss ranges:
- 20 - 170 ⁰C: loss of water
- 230 - 300 ⁰C: decomposition of product
- 350 - 900 ⁰C: decomposition of the decomposition products and loss of gases
- > 900 ⁰C: decomposition of the decomposition products and loss of gases
The decomposition reaction has been determined to be the following:
K2CoFe(CN)6 x 1.4 H2O -> K3Fe(CN)6 + K3Co(CN)6 + K2CO3 + Co3O4 + Fe2O3 + CoFe2O4
At temperatures over 350 ⁰C, the decomposition reaction continues.
Description of key information
Thermal analysis (differential scanning calorimetry (DSC)): Melting point > 450 °C at 1,013 hPa (OECD 102, EU Method A.1, GLP)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 450 °C
Additional information
The melting point study determined that the substance does not melt at temperatures below 450 °C. Visually, the samples did not change during the study. A supporting thermal decomposition study by J. Lehto et al. (1990) suggests that the substance starts to decompose at 230 °C, and at 300 °C the substance has completely decomposed.
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