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EC number: 237-059-9 | CAS number: 13597-86-9
- 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
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 27 March - 18 April 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27 July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 30 May 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- Diammonium dihydrogenpyrophosphate
- EC Number:
- 237-059-9
- EC Name:
- Diammonium dihydrogenpyrophosphate
- Cas Number:
- 13597-86-9
- Molecular formula:
- H4O7P2.2H3N
- IUPAC Name:
- diazanium;phosphono phosphate
- Test material form:
- solid
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: Provided by lead regsitrant, no lot number.
- Expiration date of the lot/batch: 05 October 2018
- Purity test date: no data
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Approximately 4 °C, in the dark
- Stability under test conditions: stable
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- > 400 °C
Any other information on results incl. tables
Similar thermographic profiles were obtained using air and nitrogen atmospheres. The endotherm over the range 136 to 202 °C (409 to 475 K) was considered to be the vaporisation of entrained water; therefore, it was not due to a phase change of the test item.
Determination 7 showed that the endotherm was not repeated during the second heating phase which would be expected if it was due to the test item melting, including a freezing exotherm during the cooling phase. Even though the residue’s appearance after the endotherm could suggest the test item had melted/softened, it was considered that this may have just been a consequence of the released entrained water semi-liquefying the test item. The fact that the residue was not dispersed around the periphery of the crucible demonstrates that complete melting did not occur.
As there was no definitive phase change observed, the test item was assessed to not melt below 400 °C (673 K). However, there were some baseline undulations in the thermograms above 200 °C (473 K) which could suggest that some minor decomposition or rearrangement occurred.
It was not known what the small endotherm from approximately 60 to 80 °C was but this may have been due to volatilisation of a minor volatile component. It was certainly not a phase change of the test item as a whole.
Applicant's summary and conclusion
- Conclusions:
- The test item did not melt at temperatures below 400 °C (673 K), by differential scanning calorimetry, designed to be compatible with Method A.1 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.
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