Registration Dossier
Registration Dossier
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 231-850-2 | CAS number: 7759-02-6
- 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

Endpoint summary
Administrative data
Description of key information
Additional information
Read-across statement:
In the aqueous and terrestrial environment, strontium sulfate dissolves in (pore) water releasing strontium cations and sulfate anions.
Sulfate:Sulfates are of low environmental toxicity (OECD SIDS for Na2SO4) as sulfate is essential to all living organisms and their intracellular and extracellular concentrations are actively regulated.
Strontium: No or few ecotoxicological data are available for strontium sulfate itself. For the assessment of the environmental fate and behaviour of strontium substances, a read-across approach is applied based on all information available for inorganic strontium compounds. This is based on the common assumption that after emission of metal compounds into the environment, the moiety of toxicological concern is the potentially bioavailable metal ion (i.e., Sr2+).This assumption is considered valid as the ecotoxicity is only affected by the strontium-ion and not by the counter (sulfate) ion.The speciation and chemistry of strontium is rather simple.
As reactive electropositive metal, strontium is easily oxidized to the stable and colourless Sr2+ion in most of its compounds, the chemical behaviour resembling that of calcium and/or barium (Wennig and Kirsch, 1988). In the environment, the element only occurs in one valence state (Sr2+), does not form strong organic or inorganic complexes and is commonly present in solution as Sr2+(Lollar, 2005). Consequently, the transport, fate, and toxicity of strontium in the environment are largely controlled by solubility of different Sr-salts (e. g., SrCO3, Sr(NO3)2, SrSO4, …).
These findings are sufficient justification for the implementation of a read-across strategy with ecotoxicity results obtained in tests that were conducted with different strontium compounds that generate free Sr2+-ions in solution, and this for all relevant environmental endpoints that were considered.
In sum, the environmental hazard assessment is based on strontium.
References:Wennig, R.; Kirsch, N. (1988): Chapter 57 Strontium, In: Seiler, U. G. et al.(eds), Handb. Tox. Inorg. Comp. NY, 631-638
Summary:
Short-term toxicity dataReliable acute data are available for three trophic levels: algae, invertebrates and fish.
(i) An unbounded value of > 90.8 mg SrSO4/L (>43.3 mg Sr/L) was identified for algae.
(ii) The only bounded acute value of 262 mg/SrSO4/L (125 mg Sr/L) is available for the invertebrateDaphnia magna.
(iii) The lowest acute effect value (based on measured Sr in the test medium) was an unbounded value of >40.3 mg Sr/L (>84.5 mg SrSO4/L) for the fishCyprinus carpio.
It should be noted that the actual E(L)C50values for fish and algae may be well above the reported values as not even partial effects (i.e., mortality or growth rate inhibition) were noted at the highest test concentrations. The table below provides an overview of the most sensitive, reliable, short-term toxicity freshwater data available for strontium.
Table: Most sensitive reliable short-term toxicity endpoints for strontium in freshwater
Species |
Parameter |
Endpoint |
Value (mg Sr/L) |
Value (mg SrSO4/L) |
Reference |
Acute fish data |
|
|
|
|
|
Cyprinus carpio |
mortality |
96h-LC50 |
> 40.3 |
> 84.5 |
Tobor-Kaplon (2010) |
Acute invertebrate data |
|
|
|
|
|
Daphnia magna |
mortality/immobility |
48h-LC50 |
125 |
262 |
Biesinger and Christensen (1972) |
Algal data |
|
|
|
|
|
Pseudokirchneriella subcapitata |
growth rate |
72h-ErC50 |
> 43.3 |
> 90.8 |
Tobor-Kaplon (2010) |
Long-term toxicity data
Reliable studies on chronic toxicity of strontium to the aquatic environment are available for three trophic levels: algae, invertebrates and fish. The toxicity tests were performed using strontium nitrate or strontium chloride hexahydrate as test substance.
(i) In the study of growth inhibition of the algae speciesPseudokirchneriella subcapitataby Tablor - Kaplon,all significant effect levels (acute and chronic) were equal or higher than 43.3 mg Sr/L (conservative value). Thus, the 72-h NOEC is ≥ 90.8 mg SrSO4/L.
(ii) The study on the chronic toxicity of strontium to invertebrates (Biesinger and Christensen, 1972) reported a calculated NOEC forDaphnia magna(i.e., EC16/2) of 21 mg Sr/L (44 mg SrSO4/L.
(iii) A chronic fish study according to OECD 210 (Egeler and Morlock, 2013) was performed withDanio rerio. The NOEC (nominal) was set to ≥100 mg/L for strontium nitrate, corresponding to a re-calculated NOEC (nominal) for strontium sulfate of ≥ 86.8 mg/L.
The PNECaquaticcalculation will be conducted using the assessment factors method since a large dataset from long-term tests for different taxonomic groups is not available, a Species Sensitivity Distribution (SSD) cannot be developed and statistical extrapolation methods can thus not be used to derive the PNECaquatic. An overview of available long-term data used for PNEC-derivation is provided in the Table below.
Table: Most sensitive reliable long-term toxicity data for strontium in freshwater
Species |
Parameter |
Endpoint |
Value (mg Sr/L) |
Value (mg SrSO4/L) |
Reference |
Chronic fish data |
|
|
|
|
|
Danio rerio |
mortality |
34d-NOEC |
≥ 41.4 |
> 86.8 |
Egeler and Morlock (2013) |
Chronic invertebrate data |
|
|
|
|
|
Daphnia magna |
mortality |
21d-NOEC |
21 |
44 |
Biesinger and Christensen (1972) |
Chronic algae data |
|
|
|
|
|
Pseudokirchneriella subcapitata |
growth rate |
72h-NOECr |
≥ 43.3 |
> 90.8 |
Tobor-Kaplon (2010) |
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
