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Diss Factsheets
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EC number: 212-415-6 | CAS number: 814-95-9
- 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
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1996
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- according to guideline
- Guideline:
- other: no guideline available (publication data)
- Principles of method if other than guideline:
- The thermogravimetric measurements were performed with a TA Instruments Model 951 2000 (temperature range, ambient to 1200°C). The evolved gases were examined by a Fisons-VG Thermolab MS and a Bruker FTIR IFS 48, both coupled
with a TGA unit. The FTIR has a resolution of 8 cm- 1. DSC analysis was carried out by heating the obtained solids in a DSC 910-2000 analyser at 10°C min- ~ from roomtemperature up to 600°C. - GLP compliance:
- no
- Type of method:
- thermal analysis
- Key result
- Decomposition:
- yes
- Remarks:
- First, loss of water at 169 °C then at 420°C, formation of strontium carbonate.
- Decomp. temp.:
- 169 °C
- Sublimation:
- no
- Remarks on result:
- not determinable
- Conclusions:
- The melting point can not be measured because the substance decomposes from 169 °C -loss of water) to 420-590°C (loss of CO and CO2).
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2015
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- according to guideline
- Guideline:
- other: no guideline available (publication data)
- GLP compliance:
- not specified
- Type of method:
- thermal analysis
- Decomposition:
- yes
- Decomp. temp.:
- 140 °C
- Sublimation:
- no
- Remarks on result:
- not determinable
- Conclusions:
- 140°C : The first endothermic peak in the temperature range 413–473 K (140°C-200°C) corresponds to loss of adsorbed water.
450°C : The decomposition of anhydrous strontium oxalate starts at a temperature of 723 K (450°C) corresponding to loss of one CO molecule per molecule of oxalate.
700°C : The third step in the decomposition is due to decomposition of strontium carbonate formed in the second step with loss of carbon dioxide.
Referenceopen allclose all
The following steps describe the decomposition of the strontium .
First Step : The mass spectrometer results indicate that the primary fragment for the first mass loss corresponds with m/e = 18 (loss of coordinated water). By DSC an endothermic peak indicates the dehydratation takes place in two steps (169 and 190°C). From FTIR results, it is also shown that water is the only gas evolved.
In a second step, the percentage mass loss between 420 and 590°C correponds to the formation of strontium carbonate from anhydrous strontium oxalate by the evolution of CO. The mass spectrometer, detected CO2 (m/e = 44) concurrent with CO loss (m/e = 28) in an inert atmosphere
The FTIR spectrum corresponding with this temperature interval also shows peaks due to both CO and CO2 vibrations.
After DSC measurements, traces of black carbon are seen on the cooled residue, confirming that carbon is formed.
The first endothermic peak in the temperature range 413–473 K (140°C-200°C) corresponds to loss of adsorbed water.
The decomposition of anhydrous strontium oxalate starts at a temperature of 723 K (450°C), with total mass loss of 14.10 % corresponding to loss of one CO molecule per molecule of oxalate.
The third step in the decomposition, which starts at a temperature of 973 K (700 °C), is due to decomposition of strontium carbonate formed in the second step. The mass loss in this step of Thermogravimetry analysis is 24.26 % which suggests evolution of carbon dioxide.
Description of key information
The melting point can not be measured because the substance decomposes from 169°C-250°C (loss of water) to 420-590°C (loss of CO and CO2).
Key value for chemical safety assessment
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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