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EC number: 231-133-4 | CAS number: 7440-24-6
- 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

Surface tension
Administrative data
- Endpoint:
- surface tension
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
Cross-referenceopen allclose all
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
- Endpoint:
- water solubility
- Type of information:
- other: Handbook data
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable - Handbook data
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Remarks on result:
- other: Strontium reacts with water
- Remarks:
- CRC, 2008
- Conclusions:
- Strontium reacts with water.
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
- Endpoint:
- substances / mixtures which in contact with water emit flammable gases
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2016-05-19 to 2016-05-23
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- UN Manual of Tests and Criteria: Test N.5 (Test method for substances which in contact with water emit flammable gases)
- Version / remarks:
- 2015
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- signed 2013-03-22
- Test procedure:
- step 1
- Identity of evolved gas:
- other: hydrogen
- Remarks:
- assumption
- Remarks on result:
- other: The test item emitted gas when placed in a bowl containing distilled water, but a spontaneous ignition was not observed.
- Test procedure:
- step 2
- Identity of evolved gas:
- other: hydrogen
- Remarks:
- assumption
- Remarks on result:
- other: The test item emitted gas when placed onto a filter paper floating on the surface of a bowl containing distilled water, but a spontaneous ignition was not observed.
- Test procedure:
- step 3
- Identity of evolved gas:
- other: hydrogen
- Remarks:
- assumption
- Remarks on result:
- other: The test item emitted gas when a few drops of water were added to the test item, but a spontaneous ignition was not observed.
- Key result
- Test procedure:
- step 4
- Max. rate of gas release:
- 200 L/kg min
- Identity of evolved gas:
- other: hydrogen
- Remarks:
- assumption
- Remarks on result:
- other: form of the test item: swarf
- Interpretation of results:
- Category 1 (substances or mixtures which in contact with water release flammable gases which may ignite spontaneously) based on GHS criteria
- Conclusions:
- The test item Strontium emitted gas in contact with water in each of the 4 steps of the test procedure. Based on the chemical reaction, it is assumed that hydrogen, an extremely flammable gas (Flam. Gas 1, H220), evolves upon contact of strontium with water.According to the results of the test for substances which in contact with water emit flammable gases (max. gas evaporation rate of 200 L/kg/min, no self-ignition of the evolved gas, gas assumed to be flammable), the test item in the tested form (i.e. swarf) meets the following classification criteria:UN Transport Regulation:The test item in the tested form (i.e. swarf) meets the classification criteria of Class 4 Division 4.3 “Substances which in contact with water emit flammable gases” according to the UN Transport Regulation.Packaging group Ishould be assigned to the test item in the tested form (i.e. swarf).GHS and EC 1272/2008 (CLP-Regulation)Annex 1: 2.12:The test item in the tested form (i.e. swarf) meets the classification criteria of a “Substance or mixture which in contact with water emit flammable gases”according to GHS and EC 1272/2008 (CLP-Regulation) Annex 1: 2.12,category 1.
The temperature during the tests was 21 °C
Step 1
The test item emitted gas when placed in a bowl containing distilled water, but a spontaneous ignition was not observed.
Step 2
The test item emitted gas when placed onto a filter paper floating on the surface of a bowl containing distilled water, but a spontaneous ignition was not observed.
Step 3
The test item emitted gas when a few drops of water were added to the test item, but a spontaneous ignition was not observed.
Step 4
Pieces and nuggets of the test item of different forms and sizes with a weight of approximately 10 or 5 g were used for the three tests. The following tables show the results of Step 4:
Table 1: Results of step 4 (Test 1)
Amount of test item [g] | Test 1 | ||
10.00 (small pieces and swarf) | |||
Amount of water [mL] | 20 | ||
Temperature (H2O) [°C] | 21.1 | ||
Time [s] | Amount of emitted gas [mL] | Time [s] | Amount of emitted gas [mL] |
40 | 200 | 134 | 1300 |
75 | 300 | 144 | 1400 |
90 | 400 | 157 | 1500 |
95 | 500 | 169 | 1600 |
100 | 600 | 186 | 1700 |
103 | 700 | 200 | 1800 |
106 | 800 | 223 | 1900 |
110 | 900 | 248 | 2000 |
115 | 1000 | 390 | >2000 |
120 | 1100 | 930 | >2000 |
126 | 1200 | -- | -- |
As Table 1 indicates, the whole test item reacted with water within 930 s. The highest gas evolution rates were observed between 103 and 106 s of about 200 L/kg/min (12,000 L/kg/h).
Table 2: Results of step 4 (Test 2)
Amount of test item [g] | Test 2 | ||
5.10 (three nuggets) | |||
Amount of water [mL] | 20 | ||
Temperature (H2O) [°C] | 21.1 | ||
Time [s] | Amount of emitted gas [mL] | Time [s] | Amount of emitted gas [mL] |
690 | 200 | 2228 | 600 |
780 | 240 | 2430 | 640 |
830 | 260 | 2715 | 700 |
925 | 300 | 2940 | 740 |
1085 | 340 | 3300 | 800 |
1305 | 400 | 3600 | 840 |
1485 | 440 | 8100 | 1440 |
1740 | 500 | 10800 | 1440 |
1940 | 540 | -- | -- |
As Table 2 indicates, the whole test item reacted with water within 8100 s. The highest gas evolution rate was observed at 780 s of about 5.2 L/kg/min (314 L/kg/h).
Table 3: Results of step 4 (Test 3)
Amount of test item [g] | Test 3 | ||
5.59 (one nugget) | |||
Amount of water [mL] | 20 | ||
Temperature (H2O) [°C] | 20.6 | ||
Time [s] | Amount of emitted gas [mL] | Time [s] | Amount of emitted gas [mL] |
760 | 200 | 3580 | 780 |
1150 | 260 | 3680 | 800 |
1350 | 320 | 3933 | 840 |
1635 | 400 | 4180 | 880 |
2088 | 500 | 6110 | 1080 |
2200 | 520 | 7635 | 1200 |
2303 | 540 | 9630 | 1320 |
2500 | 580 | 15291 | 1420 |
2607 | 600 | 16320 | 1440 |
2812 | 640 | 18730 | 1460 |
3023 | 680 | 20760 | 1480 |
3121 | 700 | 22600 | 1480 |
3343 | 740 | 24420 | 1500 |
In test 3, most of the test item reacted with water within 24420 s. The residue of the test item was left in the apparatus over the weekend. After three days the total gas volume was determined to be 1540 mL. The highest gas evolution rate was observed at 1350 s of about 3.2 L/kg/min (193 L/kg/h).
Depending on the physical form of the test item, whether it exists in small pieces and sor in bigger nuggets, different results are obtained.
The following table summarizes the highest gas evolution rates.
Gas evolution rate
Test 1 | Test 2 | Test 3 | |
Physical form | Small pieces & swarf | 3 nuggets | 1 nugget |
Max. gas evolution rate [L/kg/h] | 12,000 | 314 | 193 |
Max. gas evolution rate [L/kg/min] | 200.0 | 5.2 | 3.2 |
Data source
Materials and methods
Results and discussion
Applicant's summary and conclusion
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