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EC number: 235-107-3 | CAS number: 12068-86-9
- 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
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- transformation / dissolution of metals and inorganic metal compounds
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-05-06 to 2015-06-15
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media
- Version / remarks:
- 2001
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: transformation/ dissolution
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.904 µg/L
- Element analysed:
- Fe
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 672 h
- Test conditions:
- pH 6, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: at least
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.301 µg/L
- Element analysed:
- Fe
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 168 h
- Test conditions:
- pH 6, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other:
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.301 µg/L
- Element analysed:
- Fe
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 24 h
- Test conditions:
- pH 6, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other:
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.185 µg/L
- Element analysed:
- Fe
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 672 h
- Test conditions:
- pH 8, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other:
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.185 µg/L
- Element analysed:
- Fe
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 168 h
- Test conditions:
- pH 8, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other:
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.555 µg/L
- Element analysed:
- Fe
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 24 h
- Test conditions:
- pH 8, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: at least
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.445 µg/L
- Element analysed:
- Zn
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 672 h
- Test conditions:
- pH 6, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: at least < LOQ (<0.4446)
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 2.746 µg/L
- Element analysed:
- Zn
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 168 h
- Test conditions:
- pH 6, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: SD: ± 0.241 µg/L
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 1.537 µg/L
- Element analysed:
- Zn
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 24 h
- Test conditions:
- pH 6, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: SD: ± 1.448 µg/L
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.041 µg/L
- Element analysed:
- Zn
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 672 h
- Test conditions:
- pH 8, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: < LOD (<0.0411)
- Key result
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- < 0.041 µg/L
- Element analysed:
- Zn
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 168 h
- Test conditions:
- pH 8, agitation at 100 rpm, 21.5 ± 1.5 °C
- Remarks on result:
- other: < LOD (<0.0411)
- Type of test:
- full transformation/dissolution test - metals and sparingly soluble metal compounds
- Mean dissolved conc.:
- 0.209 µg/L
- Element analysed:
- Zn
- Loading of aqueous phase:
- 1 mg/L
- Incubation duration:
- 24 h
- Test conditions:
- pH 8, agitation at 100 rpm, 21.5 ± 1.5 °C
- Details on results:
- Temperature
The temperature of the thermostatically controlled room was recorded with a Testo 175-T2 data logger. The mean temperature was 20.3 ± 0.3 °C during the test with 1 mg/L loading at pH 6 and 20.4 ± 0.2 °C during the test at pH 8. Therefore, the mean temperature is in agreement with the OECD guidance document 29.
Solution pH and oxygen concentrations
In solutions containing 1 mg/L of the test item at pH 6 and pH 8 as well as in method blanks (BW), the pHs were in the range of 5.8 – 6.6 and 7.4 – 8.1, respectively
Mass balance
The measured iron concentrations in samples with test item were mostly below respective LODs/LOQs or slightly above. Therefore, these amounts of iron were not considered for calculation of mass balance. The recovery was 21.4 % - 61.0 % for pH 6 and 42.0 – 51.4 % for pH 8., indicating that aqua regia is not sufficient for a complete dissolution of the test item. This is expected for inorganic pigments.
Within-vessel variation and between-vessel variation
According to the guidance, “[…]it is reasonable to anticipate that for a constant loading of a substance, tested in a narrow particle size (e.g. 37 - 44 μm) and total surface area range, the within-vessel variation in transformation data should be less than 10 % and the between-vessel variation should be less than 20 %”.
The particle size distribution of each loading replicate may differ and thus resulting in different overall total surface areas per vessel. Since the exposed surface area is affecting the rate of transformation and dissolution of sparingly soluble metal compounds, increases in vessel variations may be observed in tests of materials with wider particle size distributions.
For the measured iron and zinc concentrations these variations are mostly not within the limits
Background concentrations for zinc at pH 6 and pH 8 were measured to be in the range of test item loaded samples. Therefore, the measured concentrations from test item loaded vessels at pH 6 and 8 were background (means) corrected. The background concentration of iron was below the LOD. - Conclusions:
- The transformation/dissolution test (OECD Series on Testing and Assessment Number 29, 2001) of "Magnesium ferrite " at a loading of 1 mg/L at pH 6 and 8, performed for 28d, resulted in Fe concentrations below the LOD/LOQ and maximum Zn concentrations of 2.75 µg/L (pH = 6, 7d). Thus, the extent to which "Magnesium ferrite " can produce soluble available ionic and other metal-bearing species in aqueous media is limited.
Reference
Method validation summary
Validation parameter | Results | Comment |
selectivity | selective wavelength and isotopes for detection and evaluation of Fe and Zn |
|
linearity | applied calibration functions were linear | correlation factor at least 0.999961 |
limit of detection | Fe: 0.1216 – 0.7443 µg/L Zn: 0.0149 – 0.1482 µg/L |
|
limit of quantification |
Fe: 0.3647 – 2.2298 µg/L Zn: 0.0448 – 0.4446 µg/L |
|
accuracy and precision |
Mean recovery for TM-25.4 1st series: Fe (259.940 nm): 94.6 ± 1.6 % (n = 10) Zn (213.857 nm): 103.1 ± 1.8 % (n = 10) 2nd series: Fe (240.489 nm): 92.2 ± 2.7 % (n = 4) 3rd series: Fe (259.940 nm): 113.9 ± 39.8 % (n = 11) Zn (202.548 nm): 98.9 ± 3.4 % (n = 11) 4th series: Fe (239.563 nm): 108.2 ± 23.5 % (n = 4) 5th series: Fe (259.940 nm): 103.1 ± 21.7 % (n = 7) Zn (202.548 nm): 99.6 ± 2.7 % (n = 7) |
Diluted (5 fold) to 6.2 μg Fe/L, 8.9 μg Zn/L Due to ubiquitous Fe a slight contamination cannot be excluded for two samples from 3rd series, one sample from 4th series and one sample from 5th series. These are not within 100 ± 15 % resulting in these standard deviations. Not critical > 60% of all QA/QC samples are within these limits. |
accuracy and precision |
Mean recovery for TMDA-53.3 2nd series: Fe (240.489 nm): 100.8 ± 1.9 % (n = 4) 3rd series: Fe (259.940 nm): 110.1 ± 39.7 % (n = 11) Zn (202.548 nm): 96.3 ± 1.1 % (n = 11) 4th series: Fe (239.563 nm): 103.6 ± 7.1 % (n = 4) 5th series: Fe (259.940 nm): 99.6 ± 5.1 % (n = 7) Zn (202.548 nm): 102.5 ± 11.1 % (n = 7) |
Diluted (10 fold) to 32.5 μg Fe/L, 38.5 μg Zn/L The increased standard deviation in the 3rd series for Fe might be due to a contamination with ubiquitious Fe; one sample is not within 100 ± 15 %. Not critical > 60% of all QA/QC samples are within these limits. |
accuracy and precision |
Mean recovery for TMDA-53.3 1st series: Fe (259.940 nm): 97.9 ± 1.1 % (n = 10) Zn (213.857 nm): 102.4 ± 1.0 % (n = 10) |
Diluted (5 fold) to 65 μg Fe/L, 77.2 μg Zn/L |
accuracy and precision | Mean recovery for quality control standard QC 1st series: Fe (259.940 nm): 95.5 ± 1.8 % (n = 10) Zn (213.857 nm): 92.4 ± 2.1 % (n = 10) 2nd series: Fe (240.489 nm): 98.5 ± 2.0 % (n = 4) |
Diluted to 10 μg Fe/L, 10 μg Zn/L |
accuracy and precision | Mean recovery for quality control standard QC1 3rd series: Fe (259.940 nm): 96.6 ± 0.9 % (n = 8); Zn (202.548 nm): 95.4 ± 1.6 % (n = 8) 4th series: Fe (239.563 nm): 97.3 ± 2.1 % (n = 4) 5th series: Fe (259.940 nm): 95.8 ± 2.1 % (n = 7); Zn (202.548 nm): 92.4 ± 2.4 % (n = 7) |
Diluted to 10 μg Fe/L, 10 μg Zn/L |
accuracy and precision | Mean recovery for quality control standard QC1 3rd series: Fe (259.940 nm): 97.2 ± 0.6 % (n = 2) Zn (202.548 nm): 95.1 ± 0.3 % (n = 3) |
Diluted to 100 μg Fe/L, 100 μg Zn/L In the 3rd series one sample with a recovery of 428 % regarding Fe is rejected because this can assigned to a Fe contamination. Not critical > 60% of all QA/QC samples are within these limits. |
accuracy and precision | Mean recovery for recalibration standard 1st series: Fe (259.940 nm): 94.7 ± 10.6 % (n = 10) Zn (213.857 nm): 104.0 ± 44.4 % (n = 10) 2nd series: Fe (240.489 nm): 91.2 ± 3.9 % (n = 4) 3rd series: Fe (259.940 nm): 101.8 ± 6.0 % (n = 8) Zn (202.548 nm): 85.7 ± 1.0 % (n = 8) 4th series: Fe (239.563 nm): 95.9 ± 2.0 % (n = 4) 5th series: Fe (259.940 nm): 99.7 ± 2.6 % (n = 7) Zn (202.548 nm): 104.2 ± 10.9 % (n = 7) |
Diluted to 5 μg Fe/L, 5 μg Zn/L The increased standard deviation in the 5th series for Zn might be due to a contamination with ubiquitous Zn; one sample is not within 100 ± 15 %. Not critical > 60% of all QA/QC samples are within these limits. |
accuracy and precision | Mean recovery for recalibration standard 3rd series: Fe (259.940 nm): 97.7 ± 0.6 % (n = 3) Zn (202.548 nm): 94.3 ± 0.3 % (n = 3) |
Diluted to 50 μg Fe/L 50 μg Zn/L |
trueness | Mean recoveries of fortified samples: Fe: 81.8 – 109.6 % Zn: 84.0 – 164.9 % |
In sample fortification from the 1st and the 5th measurement series there was obviously a mistake in sample preparation because the recoveries are not all within 100 ± 15 %. This is not critical, the series are valid because > 60 % of all QA/QC samples are within these limits. This approach is according to internal SOPs for GLP and accreditation according to ISO 17025 |
Recoveries of fortified samples Iron (values were rounded, internal calculations were performed with more digits)
|
measured Fe [μg/L] |
calculated Fe after addition [μg/L] |
Recovery [μg Fe/L] |
Recovery [%] |
1st series 1 mL of sample + 4 mL of 5 μg Fe/L |
||||
vessel 4, sample a after 2h |
<LOD |
4.000 |
4.148 |
103.7 |
vessel 4, sample a after 6h |
<LOD |
4.000 |
4.255 |
106.4 |
vessel 4, sample a after 1d |
<LOD |
4.000 |
4.305 |
107.6 |
vessel 4, sample a after 4d |
<LOQ |
4.000 |
4.214 |
105.3 |
vessel 4, sample a after 7d |
<LOD |
4.000 |
4.127 |
103.2 |
vessel 4, sample a after 14d |
0.914 |
4.183 |
4.583 |
109.6 |
vessel 4, sample a after 21d |
<LOQ |
4.000 |
4.266 |
106.7 |
vessel 4, sample a after 28d |
<LOD |
4.000 |
4.182 |
104.6 |
2nd series 2 mL of sample + 3 mL of 75 μg Fe/L |
||||
vessel 4 |
95.64 |
83.254 |
84.302 |
101.3 |
4th series 2 mL of sample + 3 mL of 75 μg Fe/L |
||||
vessel 1 |
201.213 |
60.243 |
61.925 |
102.8 |
5th series 1 mL of sample + 4 mL of 50 μg Fe/L |
||||
vessel 1, sample a after 2h |
1.595 |
40.319 |
34.124 |
84.6 |
vessel 1 sample a after 6h |
<LOD |
40.000 |
33.185 |
83.0 |
vessel 1, sample a after 1d |
<LOQ |
40.000 |
32.902 |
82.3 |
vessel 1, sample a after 4d |
<LOQ |
40.000 |
32.991 |
82.5 |
vessel 1, sample a after 7d |
22.402 |
44.480 |
36.867 |
82.9 |
vessel 1, sample a after 14d |
<LOD |
40.000 |
32.735 |
81.8 |
vessel 1, sample a after 21d |
<LOD |
40.000 |
32.923 |
82.3 |
vessel 1, sample a after 28d |
<LOD |
40.000 |
32.895 |
82.2 |
Recoveries of fortified samples Zinc (values were rounded, internal calculations were performed with more digits)
|
measured Zn [μg/L] |
calculated Zn after addition [μg/L] |
Recovery [μg Zn/L] |
Recovery [%] |
1st series 1 mL of sample + 4 mL of 5 μg Zn/L |
||||
vessel 4, sample a after 2h |
1.217 |
4.243 |
6.706 |
158.0 |
vessel 4, sample a after 6h |
1.539 |
4.308 |
6.921 |
160.7 |
vessel 4, sample a after 1d |
1.881 |
4.376 |
7.012 |
160.2 |
vessel 4, sample a after 4d |
1.449 |
4.290 |
6.860 |
159.9 |
vessel 4, sample a after 7d |
1.564 |
4.313 |
6.884 |
159.6 |
vessel 4, sample a after 14d |
2.386 |
4.477 |
7.381 |
164.9 |
vessel 4, sample a after 21d |
2.911 |
4.582 |
6.984 |
152.4 |
vessel 4, sample a after 28d |
2.716 |
4.543 |
7.245 |
159.5 |
5th series 1 mL of sample + 4 mL of 50 μg Zn/L |
||||
vessel 1, sample a after 2h |
2.110 |
40.422 |
34.249 |
84.7 |
vessel 1 sample a after 6h |
1.360 |
40.272 |
34.518 |
85.7 |
vessel 1, sample a after 1d |
0.696 |
40.139 |
34.015 |
84.7 |
vessel 1, sample a after 4d |
1.244 |
40.249 |
34.118 |
84.8 |
vessel 1, sample a after 7d |
2.573 |
40.515 |
34.258 |
84.6 |
vessel 1, sample a after 14d |
1.752 |
40.350 |
33.981 |
84.2 |
vessel 1, sample a after 21d |
10.927 |
42.185 |
34.295 |
81.3 |
vessel 1, sample a after 28d |
1.767 |
40.353 |
34.261 |
84.9 |
Description of key information
The transformation/dissolution test (OECD Series on Testing and Assessment Number 29, 2001) of "Magnesium ferrite " at a loading of 1 mg/L at pH 6 and 8, performed for 28d, resulted in Fe concentrations below the LOD/LOQ and maximum Zn concentrations of 2.75 µg/L (pH = 6, 7d). Thus, the extent to which "Magnesium ferrite " can produce soluble available ionic and other metal-bearing species in aqueous media is limited.
The following concentrations were determined after 168 and 672 h:
pH 6 pH 8
Fe [µg/L], 168h at least <LOQ (<0.3013)<LOD (<0.1851)
Fe [µg/L], 672h at least <LOQ (<0.9039)<LOD (<0.1851)
Zn [µg/L], 168h 2.746 ± 0.241 < LOD (<0.0411)
Zn [µg/L], 672h at least <LOQ (<0.4446)<LOD (<0.0411)
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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