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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
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- 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
No irritation/corrosion to skin or eye was observed in the conducted studies with Tellurium. Furthermore no irritation was reported in an acute inhalation study with tellurium powder.
Key value for chemical safety assessment
Skin irritation / corrosion
Link to relevant study records
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012-06-13 to 2012-06-15
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.46 (In Vitro Skin Irritation: Reconstructed Human Epidermis Model Test)
- GLP compliance:
- yes (incl. QA statement)
- Details on test animals or test system and environmental conditions:
- Human Skin model:
EPISKIN-SM is a three-dimensional human epidermis model. Adult human-derived epidermal keratinocytes are seeded on a dermal substitute
consisting of a collagen type I matrix coated with type IV collagen. A highly differentiated and stratified epidermis model is obtained after 13-day
culture period comprising the main basal, supra basal, spinous and granular layers and a functional stratum corneum (Tinois et al., 1994). Its use
for skin irritation testing involves topical application of test materials to the surface of the epidermis, and the subsequent assessment of their
effects on cell viability. - Details on study design:
- The irritation potential of a chemical may be predicted by measurement of its cytotoxic effect, as reflected in the MTT assay, on the EPISKIN reconstituted human epidermis. This method is approved by international regulatory agencies as a replacement for the identification of irritants / corrosives in the in vivo Rabbit skin assay (OECD 404).
- Irritation / corrosion parameter:
- other: other: relative viability (%)
- Value:
- 103
- Remarks on result:
- other:
- Remarks:
- Basis: mean. Time point: after 15 minutes incubation. Reversibility: no data. Remarks: The relative cell viability was 103 % of negative control; as this value is clearly above the threshold value of ≤ 50 % for classification, thus the test substance is considered to be not irritating.. (migrated information)
- Interpretation of results:
- not irritating
- Remarks:
- Migrated information Criteria used for interpretation of results: other: CLP; EU GHS (Regulation (EC) No 1272/2008)
- Conclusions:
- Tellurium was considered to be not irritating in an in-vitro skin irritation study using the EPISKIN model.
- Executive summary:
In a study conducted according to OECD guideline 439 in-vitro skin irritation of Tellurium was tested using the EPISKIN model.
Disks of EPISKIN (three units / chemical) were treated with Tellurium and incubated for 15 minutes at room temperature. Exposure of test material was terminated by rinsing with PBS. Epidermis units were then incubated at 37°C for 42 hours in an incubator with 5% CO2. The viability of the epidermis on each disk was assessed by incubating the tissues for 3 hours with MTT solution at 37°C in 5% CO2 protected from light. The formazan extract in acidified isopropanol was then spectrophotometrically evaluated for optical density (OD) and quantified.
SDS 5% and PBS treated epidermis were used as positive and negative controls, respectively. For each treated tissue viability was expressed as a % relative to negative control. If the mean relative viability after 15 minutes exposure and 42 hours post incubation is less or equal (≤) to 50% of the negative control, the test substance is considered to be irritant to skin.
Following exposure with Tellurium, the mean relative viability of epidermis was 103 %. All validity criteria were within acceptable limits and therefore the study can be considered as valid.
In conclusion results indicate that Tellurium can be considered to be non-irritating.
The reconstructed human epidermis model EPISKIN-SM is designed to predict and classify the skin irritant potential of chemicals, by measuring its cytotoxic effect, as reflected in the MTT assay, on the EPISKIN reconstituted human epidermis. This method is approved by international regulatory agencies as a replacement for the identification of irritants / corrosives in the in vivo Rabbit skin assay (OECD 404).
Reference
Substance |
Optical Density (OD) |
Viability (%) |
|
Negative Control: PBS |
1 |
0.669 |
88 |
2 |
0.748 |
98 |
|
3 |
0.874 |
114 |
|
mean |
0.764 |
100 |
|
standard deviation (SD) |
13.11 |
||
Positive Control: SDS 5% |
1 |
0.112 |
15 |
2 |
0.058 |
7.6 |
|
3 |
0.066 |
8.6 |
|
mean |
0.079 |
10 |
|
standard deviation (SD) |
4.01 |
||
Test Item: Tellurium |
1 |
0.859 |
112 |
2 |
0.779 |
102 |
|
3 |
0.718 |
94 |
|
mean |
0.785 |
103 |
|
standard deviation (SD) |
9.02 |
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Link to relevant study records
- Endpoint:
- eye irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012-05-15
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 438 (Isolated Chicken Eye Test Method for Identifying Ocular Corrosives and Severe Irritants)
- Qualifier:
- according to guideline
- Guideline:
- EU method B.48 (Isolated chicken eye test method for identifying occular corrosives and severe irritants)
- GLP compliance:
- yes (incl. QA statement)
- Details on test animals or tissues and environmental conditions:
- Species of chicken: ROSS 308
Source: TARAVIS KFT. 9600 Sárvár, Rábasömjéni út. 129.
Chicken heads were collected after slaughter in a commercial abattoir from chickens which are used for human consumption. Heads were collected
by a slaughter house technician. After collection, the heads were inspected for appropriate quality and wrapped with paper moistened with saline,
then placed in a plastic box that can be closed (4-5 heads/box).
The heads were transported to CiToxLAB Hungary Ltd. at ambient temperature at the earliest convenience.
The heads were received at CiToxLAB Hungary Ltd. and processed within approximately 2 hours of collection. - Vehicle:
- unchanged (no vehicle)
- Details on study design:
- Assessment of the general IN VITRO eye irritancy and regulatory GHS classification.
Not irritating
3×I
2×I, 1×II
2xII, 1xI
Slightly irritating
(GHS category 2B: Mild irritant / causes eye irritation)
3×II
2×II, 1×III
1×I, 1×II, 1×III
Moderately irritating
(GHS category 2A: Irritant / causes eye irritation)
3×III
2×III, 1×II
2xI, 1xIV1
2×III, 1×IV
2×III, 1×I
2×II, 1×IV
1×II, 1×III, 1×IV
Corrosive/severely irritating
(GHS category 1: Irreversible effects on the eye / serious damage to the eye)
3×IV
2×IV, 1×III
2×IV, 1×II
2×IV, 1×I
Corneal opacity ≥ 3 at 30 min (in at least 2 eyes)
Corneal opacity = 4 at any time point (in at least 2 eyes)
Severe loosening of epithelium (in at least 1 eye) - Irritation parameter:
- other: maximum corneal swelling
- Run / experiment:
- up to 75 min
- Value:
- 0
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class I
- Irritation parameter:
- other: maximum corneal swelling
- Run / experiment:
- up to 240 min
- Value:
- 0
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class I
- Irritation parameter:
- cornea opacity score
- Run / experiment:
- maximum
- Value:
- 0
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class I
- Irritation parameter:
- fluorescein retention score
- Run / experiment:
- 30 min.
- Value:
- 0
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class I
- Interpretation of results:
- not irritating
- Remarks:
- Migrated information Criteria used for interpretation of results: expert judgment
- Conclusions:
- In this in vitro eye irritation study in the Isolated Chicken Eyes model with Tellurium powder, the results suggest that the test item is not a severe eye irritant. Tellurium powder remained adhered to the cornea surface after the post-treatment rinse.
- Executive summary:
An in vitro eye irritation study of the test item Tellurium was performed in isolated chicken’s eyes. The irritation effects of the test item were evaluated according to the OECD No.: 438 (07th September 2009).
After the zero reference measurements, the eye was held in horizontal position and 30 mg of Tellurium was applied onto the centre of the cornea such that the entire surface of the cornea was covered. After 10 seconds, the surface was rinsed with saline. The positive control eyes were treated with 30 mg Imidazole. The negative control eye was treated with 30 μL of isotonic saline.
In this in vitro eye irritation study in the Isolated Chicken Eyes model with Tellurium, the results suggest that the test item is not a severe eye irritant, all scores were zero. Tellurium remained adhered to the cornea surface after the post-treatment rinse.
Reference
|
Corneal thickness (instrument units) Relative observation time (min)
|
|||||||||
Eye No. |
-45 min |
0 |
Change |
30 |
75 |
Max change < 75 |
120 |
180 |
240 |
Max change < 240 |
1 |
86 |
86 |
0 % |
86 |
86 |
0 % |
86 |
86 |
86 |
0 % |
3 |
88 |
87 |
-1 % |
88 |
87 |
1 % |
87 |
87 |
87 |
1 % |
4 |
86 |
86 |
0 % |
86 |
86 |
0 % |
86 |
86 |
86 |
0 % |
NC |
86 |
86 |
0 % |
86 |
86 |
0 % |
86 |
86 |
86 |
0 % |
|
Corneal opacity score Relative observation time (min)
|
||||||
Eye No. |
0 |
30 |
75 |
120 |
180 |
240 |
Max ∆ Opac |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
NC |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Fluorescein Relative observation time (min)
|
|
Eye No. |
0 |
30 |
1 |
0 |
0 |
3 |
0 |
0 |
4 |
0 |
0 |
NC |
0.5 |
0.5 |
NC = negative control
POSITIVE CONTROL
Observation |
Value |
ICE Class* |
|
Mean maximum corneal swelling at up to 75 min |
3 % |
I |
|
Mean maximum corneal swelling at up to 240 min |
7 % |
II |
|
Mean maximum corneal opacity |
3.83 |
IV |
|
Mean fluorescein retention |
2.67 |
IV |
|
Other Observations |
The Imidazole was stuck on the cornea surface after the post-treatment rinse. The cornea surface was not cleared 240 minutes after the post-treatment rinse. |
||
Overall ICE Class* |
1xII 2xIV |
The positive control Imidazole was classed as severely irritating, GHS Classification: Category 1.
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Additional information
Skin irritation:
In a study conducted according to OECD guideline 439 in-vitro skin irritation of Tellurium was tested using the EPISKIN model.
Following exposure with Tellurium, the mean relative viability of epidermis was 103 %. All validity criteria were within acceptable limits and therefore the study can be considered as valid.
In conclusion results indicate that Tellurium can be considered to be non-irritating.
Eye irritation:
An in vitro eye irritation study of the test item Tellurium was performed in isolated chicken’s eyes (OECD guideline 438). The irritation effects of the test item were evaluated according to the OECD No.: 438 (07th September 2009).
In this in vitro eye irritation study in the Isolated Chicken Eyes model with Tellurium, the results suggest that the test item is not a severe eye irritant, all scores were zero. Tellurium remained adhered to the cornea surface after the post-treatment rinse.
Justification for selection of skin irritation / corrosion
endpoint:
In an in vitro skin irritation study according to OECD 439 (Human
Skin Model Test) Tellurium was found to be not irritating to the human
skin.
Justification for selection of eye irritation endpoint:
In an in vitro "Isolated Chicken Eye Test Method for Identifying
Ocular Corrosives and Severe Irritants" according to OECD 438, Tellurium
was proven to be non-corrosive and/or not severe irritanting.
Justification for classification or non-classification
Skin irritation:
According to the CLP Regulation (EU GHS Regulation (EC) No 1272/2008) no classification and labelling is required for skin irritation of tellurium, based on reliable data from an in-vitro study according to OECD 439 (Human Skin Model Test). The mean relative viability of epidermis is well below the threshold for irritancy of ≤ 50%, for Tellurium, the mean relative viability of epidermis was 103 %.
The method is approved by international regulatory agencies as a replacement for the identification of irritants / corrosives in the in vivo Rabbit skin assay (OECD 404).
Eye irritation:
In an in vitro study conducted according to OECD Guideline no. 438, (2009), the observed scores for Tellurium in the study were all zero for maximum corneal swelling (up to 75 and 240 min), corneal opacity and fluorescein retention.
This corresponds to ICE class I for all parameters.
The absence of severe eye irritation is proven in the study and no classification and labelling for severe eye irritation according to CLP Regulation (EU GHS Regulation (EC) No 1272/2008) is required.
The ICE test method was re-evaluation by international regulatory agencies and the OECD guideline 438 was adopted (26 July 2013), mainly with respect to applicability domain for classification.
Now the use of the ICE test method is also recommended to identify chemicals that do not require classification for eye irritation or serious eye damage as defined by the UN GHS (No Category, NC).
The ICE test method is therefore suitable to be used as an initial step within a Bottom-Up testing strategy approach and negative results can be used for classification purposes.
In conclusion no classification and labelling for eye irritation according to CLP Regulation (EU GHS Regulation (EC) No 1272/2008) is required.
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