Substance profile
Tellurium dioxide
Tellurium dioxide is a chemical substance with the molecular formula O2Te.
01 · Identification
What Tellurium dioxide is
Tellurium dioxide is a chemical substance with the molecular formula O2Te. Its molecular formula is O2Te and its molecular weight is 159.6 g/mol. It boils at 1245 °C, melts at 733 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Tellurium dioxide identifiers and molecular data
Tellurium dioxide CAS number and EC number
Tellurium dioxide molecular formula and molecular weight
03 · GHS classification
Tellurium dioxide hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Tellurium dioxide pictograms and signal word
Tellurium dioxide hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Reproductive toxicity GHS chapter 3.7 | Category Lactation | H362 | — |
Tellurium dioxide hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H360Df | May damage the unborn child. Suspected of damaging fertility. |
| H362 | May cause harm to breast-fed children. |
This page lists only the codes assigned to Tellurium dioxide. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Tellurium dioxide
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Tellurium dioxide issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Tellurium dioxide precautionary statements
CLP Annex VI assigns 4 precautionary statements to Tellurium dioxide. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Tellurium dioxide name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | телуров диоксид |
| Spanish español | Dióxido de telurio |
| Czech čeština | oxid telluričitý |
| Danish dansk | tellurdioxid |
| German Deutsch | Tellurdioxid |
| Estonian eesti | telluurdioksiid |
| Greek ελληνικά | διοξείδιο του τελλουρίου |
| English English | tellurium dioxide |
| French français | Dioxyde de tellure |
| Croatian hrvatski | telurijev dioksid |
| Italian italiano | diossido di tellurio |
| Latvian latviešu | telūra dioksīds |
| Lithuanian lietuvių | telūro dioksidas |
| Hungarian magyar | Tellúrdioxid |
| Maltese Malti | diossidu tat-tellurju |
| Dutch Nederlands | telluurdioxide |
| Polish polski | ditlenek telluru |
| Portuguese português | dióxido de telúrio |
| Romanian română | dioxid de telur |
| Slovak slovenčina | oxid teluričitý |
| Slovenian slovenščina | telurjev dioksid |
| Finnish suomi | telluuridioksidi |
| Swedish svenska | tellurdioxid |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Tellurium dioxide GHS label elements
Everything CLP Annex VI fixes for Tellurium dioxide, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Tellurium dioxide
- May damage the unborn child. Suspected of damaging fertility.
- May cause harm to breast-fed children.
- Obtain special instructions before use.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF exposed or concerned:
- Get medical advice/attention.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Tellurium dioxide in the GHS label constructor →
07 · Health hazards
Tellurium dioxide health hazards and exposure limits
Tellurium dioxide hazard summary
An irritant; [MSDSonline] See Tellurium.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Tellurium dioxide occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 0.1 [mg/m3], as Te | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 25.0 [mg/m3], as Te | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Tellurium dioxide properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Tellurium dioxide boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 1245 °C (2273 °F) | at 760 mmHg | DOE PAC |
Tellurium dioxide melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 733 °C (1351.4 °F) | DOE PAC |
Tellurium dioxide density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 5.9 g/cm³ | at 25 °C | DOE PAC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Questions
Tellurium dioxide — frequently asked questions
What is the CAS number of Tellurium dioxide?
The CAS number of Tellurium dioxide is 7446-07-3. Its EC number is 231-193-1.
What is the chemical formula of Tellurium dioxide?
The molecular formula of Tellurium dioxide is O2Te and its molecular weight is 159.6 g/mol.
What does a Tellurium dioxide label have to show?
Under CLP Annex VI the label for Tellurium dioxide carries the pictogram Health hazard and the signal word is Danger.
Is Tellurium dioxide flammable?
CLP Annex VI assigns Tellurium dioxide no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Tellurium dioxide a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Tellurium dioxide. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for Tellurium dioxide?
The US occupational exposure limit reported for Tellurium dioxide is 0.1 [mg/m3], as Te (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Tellurium dioxide?
The boiling point reported for Tellurium dioxide is 1245 °C (2273 °F), at 760 mmHg (DOE PAC).
What is the melting point of Tellurium dioxide?
The melting point reported for Tellurium dioxide is 733 °C (1351.4 °F) (DOE PAC).
Nearby
Substances next to Tellurium dioxide
Keep going: substances starting with T, or search the whole database by name, CAS number, pictogram or signal word.