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EC number: 930-776-4 | CAS number: -
- 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
Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- The study was conducted between 15 January 2015 and 30 June 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Environment, Health and Safety Publications, Series on Testing and Assessment, No.29, Environment Directorate, OECD, April 2011; Annex 10, Guidance on Transformation/Dissolution of Metals and Metal Compounds in Aqueous Media
- Deviations:
- yes
- Remarks:
- See 'Deviations from study plan' comments in overall remarks section
- GLP compliance:
- yes (incl. QA statement)
- Type of study / information:
- The purpose of this study is to evaluate the transformation/dissolution of the test item in aqueous media.
Test material
- Reference substance name:
- Silicomanganese manufacturing fumes dedusting solid residues
- EC Number:
- 930-776-4
- IUPAC Name:
- Silicomanganese manufacturing fumes dedusting solid residues
- Test material form:
- other: granular solid
- Details on test material:
- Identification: SiMn fumes
Appearance/Physical State: Dark brown granular solid
Batch: 04042012
Purity: Not supplied
Expiry / Retest Date: Not supplied
Storage Conditions: Room temperature, in the dark
Constituent 1
Results and discussion
Any other information on results incl. tables
Screening Test:
The pH, dissolved oxygen content and TOC of the aqueous media prior to addition of test item are shown in the following table:
Control Sample |
pH |
Dissolved Oxygen (mg/L) |
TOC (mg/L) |
pH 5.5 Control |
5.45 |
8.71 |
1.14 |
pH 6.0 Control |
6.01 |
8.54 |
0.547 |
pH 7.0 Control |
7.02 |
8.53 |
1.49 |
pH 8.5 Control |
8.47 |
8.54 |
0.912 |
Results summary (screening test):
The concentrations of dissolved silicon and manganese in the aqueous media at a single loading of 100 mg/L shaken over a period of 24 hours are shown in the following table:
Aqueous Media |
Mean Concentration (mg/L) |
|
Silicon |
Manganese |
|
pH 5.5 |
0.426 |
2.56 x 10-2 |
pH 6.0 |
0.410 |
1.68 x 10-2 |
pH 7.0 |
0.451 |
0.288 |
pH 8.5 |
0.301 |
6.57 x 10-2 |
Full Test - 28 Day:
The pH, dissolved oxygen content and TOC of the aqueous media prior to testing are shown in the following table:
Control Sample |
pH |
Dissolved Oxygen (mg/L) |
TOC (mg/L) |
pH 5.5 Control |
5.5 |
8.54 |
0.867 |
pH 7.0 Control |
7.0 |
8.52 |
0.484 |
The concentrations of silicon and manganese of the control samples are shown in the following table:
Solution |
Silicon (mg/L) |
Manganese (mg/L) |
||
Concentration |
Mean |
Concentration |
Mean |
|
pH 5.5 Control 1 |
5.38 x 10-3 |
8.99 x 10-3 |
3.32 x 10-3 |
3.35 x 10-3 |
pH 5.5 Control 2 |
2.16 x 10-2 |
3.41 x 10-3 |
||
pH 5.5 Control 3 |
None detected |
3.31 x 10-3 |
||
pH 7.0 Control 1 |
None detected |
None detected |
None detected |
None detected |
pH 7.0 Control 2 |
None detected |
None detected |
||
pH 7.0 Control 3 |
None detected |
None detected |
The pH, dissolved oxygen, and temperature of the sample solutions after 28 days shaking are shown in the following table:
Sample |
pH |
Dissolved Oxygen (mg/L) |
Temperature (°C) |
pH 5.5 Sample 1 |
6.2 |
7.53 |
24.1 |
pH 5.5 Sample 2 |
3.9 |
8.17 |
24.1 |
pH 5.5 Sample 3 |
4.4 |
8.14 |
24.1 |
pH 7.0 Sample 1 |
4.7 |
8.11 |
24.2 |
pH 7.0 Sample 2 |
3.7 |
7.97 |
24.2 |
pH 7.0 Sample 3 |
3.6 |
8.02 |
24.2 |
The concentrations of dissolved silicon and manganese in pH 5.5 and pH 7.0 aqueous media at a loading of 1 mg/L, shaken over a period of 28 days are shown in the following table:
Solution |
Silicon (mg/L) |
Manganese (mg/L) |
||||
Conc |
Mean |
Mean Corrected for Control |
Conc |
Mean |
Mean Corrected for Control |
|
pH 5.5 Control |
None detected |
- |
- |
None detected |
- |
- |
pH 5.5 Sample 1A |
4.45 x 10-2 |
5.43 x 10-2 |
5.43 x 10-2 |
6.15 x 10-2 |
6.16 x 10-2 |
6.16 x 10-2 |
pH 5.5 Sample 1B |
6.41 x 10-2 |
6.17 x 10-2 |
||||
pH 5.5 Sample 2A |
0.173 |
0.170 |
0.170 |
8.60 x 10-2 |
8.55 x 10-2 |
8.55 x 10-2 |
pH 5.5 Sample 2B |
0.167 |
8.50 x 10-2 |
||||
pH 5.5 Sample 3A |
7.48 x 10-2 |
6.48 x 10-2 |
6.48 x 10-2 |
0.115 |
0.115 |
0.115 |
pH 5.5 Sample 3B |
5.49 x 10-2 |
0.115 |
||||
pH 7.0 Control |
None detected |
- |
- |
None detected |
- |
- |
pH 7.0 Sample 1A |
0.231 |
0.236 |
0.236 |
0.114 |
0.114 |
0.114 |
pH 7.0 Sample 1B |
0.241 |
0.114 |
||||
pH 7.0 Sample 2A |
0.278 |
0.272 |
0.272 |
0.229 |
0.230 |
0.230 |
pH 7.0 Sample 2B |
0.266 |
0.231 |
||||
pH 7.0 Sample 3A |
0.315 |
0.312 |
0.312 |
0.132 |
0.132 |
0.132 |
pH 7.0 Sample 3B |
0.309 |
0.132 |
Results summary (main test):
The concentrations of dissolved silicon and manganese in the aqueous media at a single loading of 1 mg/L shaken over a period of 28 days are shown in the following table:
Aqueous Media |
Mean Concentration (mg/L) |
|
Silicon |
Manganese |
|
pH 5.5 |
9.65 x 10-2 |
8.73 x 10-2 |
pH 7.0 |
0.273 |
0.159 |
Validation:
Linearity:
The calibration curves for the analyses were second order. The concentrations of each analyte in the sample solutions were interpolated from the respective calibration curve for each analysis.
Precision (Reproducibility):
Five individual samples were prepared in pH 6.0 aqueous media as part of the screening test to determine the precision (reproducibility) of the test.
Accuracy (Recovery):
The recovery was determined using pH 6.0 aqueous media fortified with analyte (Si and Mn) at two levels; 0.1 and 1.0 mg/L.
Limit of Quantification:
The limit of quantification (LOQ) was based on the lowest validated level of each analyte.
Limit of Detection:
The limit of detection (LOD) was based on the background equivalent concentration (BEC) for calibration curves used for the accuracy (recovery) analysis.
Results:
The results of the method validation in support of the analysis are shown in the following table:
Parameter |
Analyte |
|
Silicon |
Manganese |
|
Linearity |
2nd order response |
2nd order response |
Precision (reproducibility) |
|
|
Mean Concentration (mg/L) |
0.410 |
1.68 x 10-2 |
RSD (%) |
5.45 |
11.8 |
Accuracy (% recovery): |
|
|
Fortification at 0.1 mg/L |
117 |
98.3 |
Fortification at 1.0 mg/L |
105 |
110 |
Limit of Quantification (mg/L) |
0.10 |
0.10 |
Limit of Detection (mg/L) |
2.6 x 10-2 |
5.9 x 10-2 |
Discussion:
Accuracy data obtained for the silicon and manganese analyses were acceptable at levels of 0.10 mg/L and 1.0 mg/L.
Precision (reproducibility) data obtained for the silicon and manganese analyses were acceptable using pH 6 aqueous media. This demonstrated that inter-vessel variation is <20% for both silicon and manganese, indicating that duplicate samples from triplicate vessels is sufficient to give a representative result for the main test.
No specificity testing was possible due to the non-chromatographic nature of the method. The method (ICP-MS) was an elemental method that quantified each analyte through the intensity of a specific, discrete wavelength which resulted from the transition of gaseous atoms between excitation states.
Conclusion:
The analytical method for the determination of silicon and manganese in the aqueous media has been validated with the respect to accuracy (recovery), precision (reproducibility), limit of detection and limit of quantification. The results of the validation demonstrated that the method was acceptable for the study.
Applicant's summary and conclusion
- Conclusions:
- The concentrations of dissolved silicon and manganese observed in the main test (28-day: 1 mg/L) are:
Aqueous media pH 5.5:
Silicon concentration: 9.65 x 10-2 mg/L
Manganese Concentration: 8.73 x 10-2 mg/L
Aqueous media pH 7.0:
Silicon concentration: 0.273 mg/L
Manganese Concentration: 0.159 mg/L
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