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EC number: 234-847-4 | CAS number: 12036-39-4
- 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
Oxidising properties
Administrative data
Link to relevant study record(s)
- Endpoint:
- oxidising solids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16 March 2018 - 16 May 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- The oxidising properties of the test material were investigated at the "German Bundesanstalt für Materialforschung und -prüfung (BAM)" in accordance with the standardised guidelines Test O.1 of the United Nations Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria, 6th revised edition 2015.
- Qualifier:
- according to guideline
- Guideline:
- other: Test O.1 of the United Nations Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria, 6th revised edition 2015.
- Deviations:
- yes
- Remarks:
- see below
- Qualifier:
- according to guideline
- Guideline:
- other: Section 2.14 of Annex I of Regulation (EC) No 1272/2008 of 16 December 2008 on Classification Labelling and Packaging of Substances and Mixtures.
- Deviations:
- no
- GLP compliance:
- no
- Remarks:
- The test was performed under GLP similar conditions but not under GLP conditions. Therefore this study was considered as reliable for the evaluation of the oxidising properties of this inorganic test substance.
- Contact with:
- powdered cellulose
- Duration of test (contact time):
- > 180 s
- Key result
- Sample tested:
- 1:1 sample-to-cellulose ratio
- Parameter:
- mean burning time
- Result:
- > 180 s
- Remarks on result:
- other: combustion with orange flame
- Key result
- Sample tested:
- 4:1 sample-to-cellulose ratio
- Parameter:
- mean burning time
- Result:
- > 180 s
- Remarks on result:
- other: slow combustion with orange-coloured flame
- Key result
- Sample tested:
- reference: 3:7 mixture potassium bromate + cellulose
- Parameter:
- mean burning time
- Result:
- 127 s
- Remarks on result:
- other: Smoking combustion
- Interpretation of results:
- other: no oxidising properties
- Conclusions:
- Under the conditions of this study, the test material is not an oxidising solid. It requires no classification in accordance with either the UN GHS or CLP regulations.
- Executive summary:
The oxidising properties of the test material were investigated in accordance with the standardised guidelines Test O.1 of the United Nations Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria, 6th revised edition 2015. The GHS/CLP classification is based on the Globally Harmonised System of Classification and Labelling of Chemicals (GHS), seventh revised edition 2017 and Regulation (EC) No. 1272/2008 (CLP Regulation). It was assigned a reliability score of 1 in accordance with the criteria detailed by Klimisch (1997).
For the tests, the test substance was mixed with dry fibrous cellulose in the mass mixing ratios1: 1 and 4: 1 (test substance to cellulose). The combustion times of these mixtures were compared with reference mixtures, mass mixing ratio 3: 7, 2: 3 and 3: 2 (potassium bromate to cellulose). Cellulose with a fibre length between 50 µm and 250 µm was used as flammable
material.
If the test substance would have contained more than 10 % by mass of particles with a diameter of less than 500 µm, the entire test substance would have to be ground/mortarized into a
powder prior to the test, in order to take into account the abrasion generated during transport/handling.
Since the test substance "strontium zirconate" (223/230318/01) provided by Treibacher Industrie AG did not contain any particles smaller than 500 µm it was tested as delivered.
Results:
The mean combustion times (t1 > 180 s and t2 > 180 s) of the 1 : 1 and 4: 1 mixing ratios of both test substances to cellulose are greater than the mean combustion time of 3 : 7 mixing ratio of potassium bromate to cellulose (R1 = 127 s).
Due to the slow combustin of the mixing ratio test substance to cellulose measurements of the combustion times of the mixing ratios pottasium bromate to cellulose 2:3 (R2) and 3:2 (R3) were not performed.
Under the conditions of this study, the test material is not an oxidising solid. It requires no classification in accordance with either the UN GHS or CLP regulations.
Reference
Table 1 The Results of the Reference Mixture of Potassium Bromate and Cellulose in the Ratio of 3:7 (by Mass)
Test no. | Burning time [s] |
1 | 137 |
2 | 109 |
3 | 135 |
4 | 135 |
5 | 127 |
Mean burning time (s) = 127
Observation: Smoking combustion
Table 2 The results of the Test Material and Cellulose Mixture in the Ratio of 4:1 (By Mass)
Test no. |
Burning Time (s) |
Observations |
1 |
>180 |
|
2 |
179 |
Wire breakage with immediate reaction stop, in case of incomplete substance conversion. |
3 |
170 |
Wire breakage with immediate reaction stop, in case of incomplete substance conversion. |
4 |
140 |
Wire breakage with immediate reaction stop, in case of incomplete substance conversion. |
5 |
- |
Substance material depleted. No further measurements possible. |
Mean burning time (s) = >180
Table 3 The results of the Test Material and Cellulose Mixture in the Ratio of 1:1 (By Mass)
Test Number |
Burning Time (s) |
Observations |
1 |
>180 |
Burn-up with orange flame |
2 |
>180 |
Burn-up with orange flame |
3 |
>180 |
Burn-up with orange flame |
4 |
>180 |
Burn-up with orange flame |
5 |
>180 |
Burn-up with orange flame |
Mean burning time (s) = >180
Discussion
The ignition wire broke during each of the tests for the mixtures of test material and cellulose in the mixing ratio 4:1. Breaking of the ignition wire often occurs with test material and cellulose mixtures but this is not the case for the reference mixtures. Test O.1 states that if the wire breaks during the test, then the test should be repeated unless the wire breaking clearly does not affect the result. In each case that the wire broke, it was judged not to have affected the test.
As the mean burning times for the mixtures of test material and cellulose were greater than the mean burning time for the 3:7 (by mass) mixture of potassium bromate and cellulose, it was not necessary to determine the mean burning times for the faster burning reference mixtures.
Description of key information
The test material is not an oxidising solid.
Key value for chemical safety assessment
- Oxidising properties:
- no
Additional information
The oxidising properties of the test material were investigated in accordance with the standardised guidelines Test O.1 of the United Nations Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria, 6th revised edition 2015. The GHS/CLP classification is based on the Globally Harmonised System of Classification and Labelling of Chemicals (GHS), seventh revised edition 2017 and Regulation (EC) No. 1272/2008 (CLP Regulation). It was assigned a reliability score of 1 in accordance with the criteria detailed by Klimisch (1997).
For the tests, the test substance was mixed with dry fibrous cellulose in the mass mixing ratios1: 1 and 4: 1 (test substance to cellulose). The combustion times of these mixtures were compared with reference mixtures, mass mixing ratio 3: 7, 2: 3 and 3: 2 (potassium bromate to cellulose). Cellulose with a fibre length between 50 µm and 250 µm was used as flammable material.
If the test substance would have contained more than 10 % by mass of particles with a diameter of less than 500 µm, the entire test substance would have to be ground/mortarized into a powder prior to the test, in order to take into account the abrasion generated during transport/handling.
Since the test substance "strontium zirconate" (223/230318/01) provided by Treibacher Industrie AG did not contain any particles smaller than 500 µm it was tested as delivered.
Results:
The mean combustion times (t1 > 180 s and t2 > 180 s) of the 1 : 1 and 4: 1 mixing ratios of both test substances to cellulose are greater than the mean combustion time of 3 : 7 mixing ratio of potassium bromate to cellulose (R1 = 127 s).
Due to the slow combustin of the mixing ratio test substance to cellulose measurements of the combustion times of the mixing ratios pottasium bromate to cellulose 2:3 (R2) and 3:2 (R3) were not performed.
Under the conditions of this study, the test material is not an oxidising solid. It requires no classification in accordance with either the UN or CLP regulations.
Justification for classification or non-classification
Based on the above data, strontium zirconium trioxide does not require a classification regarding its oxidising properties, neither under CLP nor UN GHS.
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