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EC number: 236-813-4 | CAS number: 13494-80-9
- 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:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012-03-22 to 2012-04-05
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- GLP compliance:
- no
- Type of method:
- flask method
- Water solubility:
- 1.7 mg/L
- Temp.:
- 20 °C
- pH:
- >= 5.5 - <= 6.3
- Remarks on result:
- other: Mean value
- Details on results:
- ICP-MS method was used in this study to determine Tellurium concentrations.
- Conclusions:
- Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
In a study conducted according to OECD guideline 105 and EU method A6 the water solubility of tellurium powder was determined to be 1.7 mg/L at 20 °C using a modified flask method. - Executive summary:
In a study conducted according to OECD guideline 105 and EU method A6 the water solubility of tellurium powder was determined using a modified flask method. The study was performed under argon. The pH value was approx. 6.
For analytical determination the concentrations of Tellurium in the water extracts of the test item were measured by means of ICP-MS.
The mean solubility of tellurium powder was determined to be 1.7 mg/L at 20 °C.
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012-04-13 to 2012-12-27
- 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
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Water solubility:
- 0.745 mg/L
- Temp.:
- 21.4
- pH:
- 6
- Remarks on result:
- other: Screening test; loading 100 mg/L; sampling time 24 hours; dissolved Te
- Water solubility:
- 1.303 mg/L
- Temp.:
- 21.4
- pH:
- 8
- Remarks on result:
- other: Screening test; loading 100 mg/L; sampling time 24 hours; dissolved Te
- Water solubility:
- 20.02 µg/L
- Temp.:
- 21.2
- pH:
- 8
- Remarks on result:
- other: Main test: loading 1 mg/L; sampling time 7 days; dissolved Te
- Water solubility:
- 183.3 µg/L
- Temp.:
- 21
- pH:
- 8
- Remarks on result:
- other: Main test: loading 10mg/L; sampling time 7 days; dissolved Te
- Water solubility:
- 1.762 mg/L
- Temp.:
- 21
- pH:
- 8
- Remarks on result:
- other: Main test: loading 100 mg/L; sampling time 7 days; dissolved Te
- Details on results:
- Main Test
At a loading of 1 mg/L dissolved tellurium concentrations after 28 days were at 59.64 ± 4.90 µg/L at pH 8. The observed variations within (< 10%) and between (< 20 %) the test flasks are in compliance with the guidance document.
Total dissolved tellurium concentrations in method blanks exhibited higher Te levels due to potential carryover from pH-electrode or oxygen sensor. Although the electrode and the oxygen sensor were rinsed extensively with ultrapure water before inserting into another vessel a contamination is observable. Therefore, the mean Te concentration per sampling in method blanks were additionally subtracted from the measurement results and the dissolved tellurium concentrations after 28 days were calculated to be 51.77 ± 4.90 µg/L at pH 8 .
At a loading of 10 mg/L dissolved tellurium concentrations after 7 days were at 183.3 ± 8.4 µg/L at pH 8 The observed variations within (< 10%) and between (< 20 %) the test flasks are in compliance with the guidance document.
At a loading of 100 mg/L dissolved tellurium concentrations after 7 days were at 1.762 ± 0.089 mg/L at pH 8. The observed variations within (< 10%) and between (< 20 %) the test flasks are in compliance with the guidance document. - Conclusions:
- Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
For the transformation/dissolution test of tellurium a target pH of 8 was determined in a screening test at 21.5 °C. After 7 days Te concentrations were 20.02 µg/L, 183.3 µg/L and 1.762 mg/L at loadings of 1mg/L, 10 mg/L and 100 mg/L, respectively. - Executive summary:
A study was conducted to determine the transformation/dissolution of tellurium according to OECD guidance document 29 (2001). The test objective was to study the transformation & dissolution of the test item over 7 days with loadings of 1 mg/L, 10 mg/L and 100 mg/L.
The test with a loading of 1 mg/L was prolonged to 28 days.
Dissolved tellurium concentrations were determined by ICP-OES.
The OECD guidance document 29 requests the performance of the test at a pH which maximizes the dissolution. Therefore, prior to the full test a screening over 24 h (agitation at 100 rpm, 21.5 ± 1.5 °C, loadings of 100 mg/L) was conducted in test media at pH 6 and pH 8 in triplicate vessels and duplicate samples per vessel.
After 24 h the mean dissolved Te concentrations were 1.303 ± 0.035 mg/L and 0.7446 ± 0.0187 mg/L for pH 8 and 6, respectively. Based on these results the full test was performed in test media at a target pH of 8.
Solutions in the full test were sampled after 2h, 6h, 24h, 96h (4d), 168h (7d). For the test up to 28 days samples were additionally taken after 336h (14d), 504h (21d) and 672h (28d).
Solution pHs, oxygen concentrations and total dissolved tellurium concentrations were measured. The test was performed in triplicates (three replicates per pH treatment, sampled twice at each sampling point).
Final results:
At a loading of 1 mg/L dissolved tellurium concentrations after 28 days were at 59.64 ± 4.90 µg/L at pH 8.
Total dissolved tellurium concentrations in method blanks exhibited higher Te levels due to potential carryover from pH-electrode or oxygen sensor. Although the electrode and the oxygen sensor were rinsed extensively with ultrapure water before inserting into another vessel a contamination is observable. Therefore, the mean Te concentration per sampling in method blanks were additionally subtracted from the measurement results and the dissolved tellurium concentrations after 28 days were calculated to be 51.77 ± 4.90 µg/L at pH 8 .
At a loading of 10 mg/L dissolved tellurium concentrations after 7 days were at 183.3 ± 8.4 µg/L at pH 8.
At a loading of 100 mg/L dissolved tellurium concentrations after 7 days were at 1.762 ± 0.089 mg/L at pH 8.
The observed variations within (< 10%) and between (< 20 %) the test flasks are in compliance with the guidance document.
Referenceopen allclose all
Summary of the main tests
Main test |
Concentration tellurium (g/L)
|
I (24 hours) |
1.4 x 10 E-3
|
II (48 hours) |
2.5 x 10 E-3
|
III 96 hours) |
1.7 x 10 E-3
|
IV (168 hours) |
1.4 x 10 E-3
|
Mean value |
1.7 x 10 E-3
|
Standard deviation |
0.0007
|
Screening test:
Measured dissolved Te concentrations for the loading of 100 mg/L:
Sample |
pH |
Mean Te concentration mg/L±SD |
24 h |
8 |
1.303 ± 0.035 |
24 h |
6 |
0.7446 ± 0.0187 |
Main Test:
Measured dissolved Te concentrations for the loading of 1 mg/L:
Sample time |
pH |
mean Te conc. all vessels ± SD [μg/L] |
between vessel variation [%] |
variations of mean Te conc. between sampling intervals [%] |
2 h |
8 |
10.87 ± 0.52 |
4.7 |
- |
6 h |
8 |
11.83 ± 0.63 |
5.3 |
8.9 |
24 h |
8 |
18.49 ± 3.59 |
19.4 |
56.2 |
96 h (4d) |
8 |
22.42 ± 2.12 |
9.4 |
21.3 |
168 h (7d) |
8 |
28.11 ± 1.75 |
6.2 |
25.4 |
336 h (14d) |
8 |
38.26 ± 2.02 |
5.3 |
36.1 |
504 h (21d) |
8 |
49.92 ± 3.72 |
7.5 |
30.5 |
672 h (28d) |
8 |
59.64 ± 4.90 |
8.2 |
19.5 |
Measured dissolved Te concentrations for the loading of 1 mg/L -mean Te concentrations in method blanks
Sample time |
pH |
mean Te conc. all vessels ± SD [μg/L] |
between vessel variation [%] |
variations of mean Te conc. between sampling intervals [%] |
2 h |
8 |
10.60 ± 0.52 |
4.9 |
- |
6 h |
8 |
7.762 ± 0.631 |
8.1 |
-26.8 |
24 h |
8 |
12.86 ± 3.59 |
27.9 |
65.7 |
96 h (4d) |
8 |
15.52 ± 2.12 |
13.6 |
20.7 |
168 h (7d) |
8 |
20.02 ± 1.75 |
8.7 |
29.0 |
336 h (14d) |
8 |
30.19 ± 2.02 |
6.7 |
50.8 |
504 h (21d) |
8 |
41.81 ± 3.72 |
8.9 |
38.5 |
672 h (28d) |
8 |
51.77 ± 4.90 |
9.5 |
23.8 |
Measured dissolved Te concentrations for the loading of 10 mg/L
Sample time |
pH |
mean Te conc. all vessels ± SD [µg/L] |
between vessel variation [%] |
variations of mean Te conc. between sampling intervals [%] |
2 h |
8 |
99.4 ± 6.5 |
6.5 |
- |
6 h |
8 |
113.7 ± 2.4 |
2.1 |
14.3 |
24 h |
8 |
136.6 ± 4.5 |
3.3 |
20.2 |
96 h (4d) |
8 |
154.8 ± 4.5 |
2.9 |
13.4 |
168 h (7d) |
8 |
183.3 ± 8.4 |
4.6 |
18.4 |
Measured dissolved Te concentrations for the loading of 100 mg/L
Sample time |
pH |
mean Te conc. all vessels ± SD [mg/L] |
between vessel variation [%] |
variations of mean Te conc. between sampling intervals [%] |
2 h |
8 |
0.6954 ± 0.0364 |
5.2 |
- |
6 h |
8 |
0.9905 ± 0.0431 |
4.3 |
42.4 |
24 h |
8 |
1.273 ± 0.060 |
4.7 |
28.5 |
96 h (4d) |
8 |
1.526 ± 0.062 |
4.1 |
19.9 |
168 h (7d) |
8 |
1.762 ± 0.089 |
5.1 |
15.5 |
Description of key information
Data are available from a transformation dissolution test, conducted according to OECD guideline 29, and a water solubility study according to OECD guideline 105. Both study data are reliable without restrictions.
Key value for chemical safety assessment
- Water solubility:
- 1.762 mg/L
- at the temperature of:
- 21 °C
Additional information
In a study conducted according to OECD guideline 105 and EU method A6 the water solubility of tellurium powder was determined to be 1.7 mg/L at 20 °C using a modified flask method.
Transformation/dissolution study of tellurium according to OECD guidance document 29 (2001):
Screening test after 24 hours at 20.9 °C:
1.303 mg/L at pH 8
0.7446 mg/L at pH 6
Main test, sampling time 7 days, at pH 8 and 21 °C:
Loading 1 mg/L 20.02 µg/L
Loading 10 mg/L 183.3 µg/L
Loading 100 mg/L 1.762 mg/L
Loading 1 mg/L/ 28 days sampling time: 59.64 µg/L
The value of 1.762 mg/L is chosen for chemical safety assessment, as a worst case assumption.
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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