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EC number: 242-367-1 | CAS number: 18480-07-4
- 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

Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 2.1 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Marine water
- Hazard assessment conclusion:
- no data: aquatic toxicity unlikely
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 4.2 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 2 720 mg/kg sediment dw
- Assessment factor:
- 1
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- no hazard identified
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 329 mg/kg soil dw
- Assessment factor:
- 1
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
PNEC sediment:
The PNECsediment can be derived from the PNECaquatic using the equilibrium partitioning method (EPM).
A distribution/partition coefficient (KD) between the water and sediment compartment for strontium has been determined. This resulted in a typical KD, susp-water of 1,291.8 L/kg (logKD: 3.11). In a first step the units have to be converted from L/kg to m3/m3 using the formula below.
KD, susp-water(m3/m3) = 0.9 + [0.1 x (KD, susp-water(L/kg) x 2,500) / 1,000]
This results in a KD, susp-matter of 323.9 m3/m3. This value can be entered in the equation below to calculate the PNECsediment:
PNECsediment = (KD, susp-water/ RHOsusp) x PNECaquatic x 1,000
with the PNECaquatic expressed as mg/L, RHOsusp representing the bulk density of wet suspended matter (freshly deposited sediment) (1,150 kg/m3), and a KD, susp-water of 323.9 m3/m3, a PNECsediment that is expressed as mg/kg wet weight can be derived. This value can be converted to a dry weight-based PNEC, using a conversion factor of 4.6 (CONVsusp = RHOsusp/Fsolid-susp * RHOsolid) kg wet weight/ kg dry weight.
This results in a PNECsediment of 2,720 mg Sr/kg dry sediment
PNEC soil:
The PNECsoil can be derived from the PNECaquatic using the equilibrium partitioning method (EPM).
A distribution/partition coefficient (KD) between the water and soil compartment was derived for strontium of 157.03 L/kg (Log KD: 2.2). In a first step the units have to be converted from L/kg to m3/m3 using the formula below.
KD,soil (m3/m3) = 0.2 +[0.6 x (KD,soil (L/kg) x 2,500) / 1,000]
This results in a KD,soil of 235.75 m3/m3. This value can be entered in the equation below to calculate the PNECsoil
PNECsoil = (KD,soil/ RHOsoil) x PNECaquatic x 1,000
With the PNECaquatic expressed as mg/L, RHOsoil representing the bulk density of wet soil (1,700 kg/m3) and KD,soil is 157.03 m3/m3, a PNECsoil expressed as mg/kg wet weight is derived. This value can be converted to a dry weight-based PNEC, using a conversion factor of 1.13 kg wet weight/ kg dry weight.
This results in a PNECsoilof 329 mg Sr/kg dry soil
Conclusion on classification
Short-term toxicity EC/LC50 values of Sr available for 3 trophic levels are situated between >40.3 mg Sr/L and >125 mg Sr/L, corresponding to > 55.9 mg/L and 173.6 mg/L strontium hydroxide based on an average Sr content of 72%. In accordance with Regulation (EC) No 1272/2008, Table 4.1.0 (a), classification for acute aquatic hazard is not required for strontium hydroxide as all EC50/LC50 values are above the classification criteria of 1 mg/L.
Long-term toxicity data are available for three trophic levels and range from 21 mg Sr/L to ≥ 43.3 mg Sr/L, corresponding to 29.2 mg/L and 60.1 mg/L strontium hydroxide based on an average Sr content of 72%. In accordance with Regulation (EC) No 1272/2008, Table 4.1.0 (b) (i), classification for chronic aquatic hazard is not required for strontium hydroxide as all chronic EC10/NOEC values are above the classification criteria of 1 mg/L.
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