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EC number: 268-440-8 | CAS number: 68084-49-1
- 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:
- 2018-12-06 to 2019-02-28
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- 2017-02-28
- Type of method:
- differential scanning calorimetry
- Remarks:
- capillary method
- Specific details on test material used for the study:
- Storage conditions: Room temperature, closed
- Decomposition:
- yes
- Decomp. temp.:
- > 140 °C
- Sublimation:
- no
- Remarks on result:
- other: No definitive signs of a melting/boiling were observed
- Conclusions:
- Melting and Boiling Point
No definitive signs of a melting/boiling of the test item cerium neodecanoate were observed by differential scanning calorimetry (DSC) measurements (open aluminium crucible under air, up to 500 °C, heating rate of 10 K/min) and by the capillary method (up to 400 °C, heating rate of 10 K/min). The measurements were performed according to Regulation (EC) No. 440/2008 Method A.1./A.2. and OECD Test Guideline 102/103 (1995) at atmospheric pressure (1002 – 1008 hPa). It is assumed that the test item decomposes at temperatures above 140 °C.
Thermal Stability
The test item cerium neodecanoate shows an endothermic effect in the temperature range from 350 °C to >500 °C.
Reference
Melting and Boiling Point (DSC)
In the DSC runs PN16793 and PN16816 the test item showed a broad endothermic effect in the temperature range of 360 °C to >500 °C.
In the DSC run PN16797 a broad endothermic effect was observed in the temperature range of 370 °C to 430 °C directly followed by an exothermic effect in the temperature range of 430 °C to >500 °C, with a decomposition energy of greater -1960 J/g. Based on the appearance of the test item, the fact that the test substance was sampled without homogenisation and containing 8 % free acid, it can be assumed that the run PN16797 does not represents the test item correctly.
Results of the DSC-measurement
No. |
Sample weight [mg] |
Onset of Effect [°C] |
Range of effect [°C] |
Weight loss [mg] |
Atmospheric pressure [hPa] |
Remarks |
PN16793 |
13.48 |
382 |
360 – >500 (endo) |
10.94 81 % |
1005.7 |
|
PN16797 |
12.32 |
379 |
370 – 430 (endo) 430 – >500 (exo) |
9.18 75 % |
1006.4 |
|
PN16816 |
17.57 |
385 |
360 – >500 (endo) |
14.37 82 % |
1008.0 |
homogenised sample |
It is not possible to assign any of the observed endothermic effects definitely to melting or boiling of the test item.
Due to the fact that the measured weight loss of each sample was only between 75 % and 82 % of the respective initial sample weight, none of the observed endothermic effects can be assigned to boiling of cerium neodecanoate.
Measurements by the Capillary Method
For verification of the results the test item was additionally tested with the capillary method. There, the test item started to liquefy at a temperature of approx. 80 °C. During the liquefying process the test item changed the colour from brown to orange/yellow. At approx. 120 °C the test item to rose partly in the capillary and the colour was yellowish. At a temperature of ~140 °C a formation of bubbles could be observed. At ~150 °C the test item started to get darker. At ~200 °C the test item turned greenish. At ~230 °C formation of white crystals partly occured, at ~250 °C liquid fraction decreased, at ~300 °C the most part of liquid was evaporated and a residue remained in the capillary and got darker. The measurement was stopped at 400 °C with a black residue solid in the capillary. Neither a melting nor a boiling of the test item could be observed. It is assumed, that the test item decomposes at temperatures >150 °C.
A second measurement with the homogenised test item was tested with the capillary method. There, the test item started to liquefy at a temperature of approx. 70 °C. During the liquefying process the test item changed the colour from brown to orange/yellow. At approx. 100 °C a formation of small bubbles could be observed and at ~125 °C the bubbles get greater and the test item to rise in the capillary and flowed back. At ~140 °C the test item started to get darker. At ~200 °C the test item turned to green/brown/grey. At ~243 °C formation of white solid partly and at ~270 °C the most part of liquid was evaporated with an appearance of apricot colour. The measurement was stopped at 400 °C with a brown/apricot/green residue solid in the capillary. Neither a melting nor a boiling of the test item could be observed. It is assumed, that the test item decomposes at temperatures >140 °C.
Thermal Stability (DSC)
In the temperature range from 350 °C to >500 °C, a broad endothermic effect was observed. After the measurement a black residual of the test item remained in the crucible.
Results of the DSC-measurements
No. | Sample weight [mg] |
Start of effect [°C] |
Energy [J/g] |
PN16830 |
14.18 |
360 |
+200 (endothermic) |
PN16831 |
13.46 |
350 |
>+250 (endothermic) |
Description of key information
Cerium neodecanoate decomposes at temperatures above 140 °C
Key value for chemical safety assessment
Additional information
Melting and Boiling Point
No definitive signs of a melting/boiling of the test item cerium neodecanoate were observed by differential scanning calorimetry (DSC) measurements (open aluminium crucible under air, up to 500 °C, heating rate of 10 K/min) and by the capillary method (up to 400 °C, heating rate of 10 K/min). The measurements were performed according to Regulation (EC) No. 440/2008 Method A.1./A.2. and OECD Test Guideline 102/103 (1995) at atmospheric pressure (1002 – 1008 hPa). It is assumed that the test item decomposes at temperatures above 140 °C.
Thermal Stability
The test item cerium neodecanoate shows an endothermic effect in the temperature range from 350 °C to >500 °C.
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