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Diss Factsheets
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EC number: - | CAS number: -
- 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:
- 26 Mar 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- no
- Type of method:
- capillary method
- Remarks:
- and Differential scanning calorimetry
- Decomposition:
- yes
- Decomp. temp.:
- >= 182 °C
- Remarks on result:
- other: atmospheric pressure assumed
Reference
Study 1 – Capillary tube in a liquid bath
Observations: In the first run the sample was heated rapidly from RT to 280 °C at approx. 10 °C/min to identify the temperature range for the onset of any thermally induced changes in sample appearance. The sampled remained unaffected up to approx. 180 °C+/- 5 °C as indicated by sample discoloration. However, no melting was observed.
In a second run, a fresh sample was pre heated to 160 °C, followed by a controlled bath temperature rise of approximately 3 K/min to 280 °C. Now the onset of discoloration (white to amber) could be identified to be 182 ± 0.3 °C. The sample discoloration increases gradually to a complete blackening indicating an increased charring of the specimen. No melting/boiling was observed in the test range up to 280 °C though.
Results and discussions
Melting / freezing point: -
Decomposition: yes
Decomp. temp.: 182 °C
Conclusions: The melting point of the test item could not be determined as decomposition was observed starting a temperature of 182.0 ± 0.3 °C.
Study 2 – DSC
Results and discussion
Melting / freezing point: -
Decomposition: yes
Decomp. temp.: ≥182 °C
The DSC measurement was conducted with a heating rate of 10 K/min showed an endothermal effect in the temperature range 180 - 220 °C, followed by a pronounced exothermal effect in the range of 220-260 °C. However, the remains of the test item were black particles. A mass loss approximately 14% was observed. The shape and nature of the observed thermal events of the heat flow curve indicate the occurrence of decomposition reactions rather than the melting of the test substance.
An additional supporting study using a capillary method had been performed in order to examine thermal effects visually and to clarify whether melting occurs. By the capillary method DSC results were confirmed: No melting occurs, instead the substance decomposes before melting.
Conclusions:
The substance starts to decompose without melting at 182 °C.
Executive Summary: Melting point of Reaction mass of potassium sodium phosphotartrate and potassium sodium tartrate and potassium sodium ortho-phosphate was tested following OECD Guideline 102 using two complementary methods (Differential Scanning Calorimetry and Capillary tube in a liquid bath method). As a result of this test, the melting point of the test item could not be determined as a decomposition was observed starting at a temperature of 182 °C.
Description of key information
For chemical safety assessment, the experimentally obtained decomposition temperature is used. No melting point could be determined experimentally.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 182 °C
Additional information
decomposition at 182 °C
Epiwin results for CSA:
Melting point: 196.78 °C (calculated for constituent 2) and 90.27
°C (calculated for constituent 1)
Boiling point: 491.45 °C (calculated for constituent 2) and 480.00 °C
(calculated for constituent 1)
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