Thallium
Tl204.383 g/mol Calculated
Also called Ramor, Talio, Thulium Metallicum and Tl.
A heavy metal once sold as rat poison and now banned for it, tasteless and slow enough that it became a favourite of poisoners in fiction. Element 81.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Other namesfrom sourcePubChem / Wikidata
- Formula and weightcomputedPubChem
- 2D drawingcomputedPubChem structure, drawn by RDKit
Where you encounter it
A pure element or an engineered material, rather than an ingredient in a product.
Sources and notes
- The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.
Properties and sources
Calculated by PubChem
- Molecular formula
- Tl
- Molecular weight
- 204.383 g/mol
Reported Hazard label (GHS), ECHA, EU CLP Regulation, Safe Work Australia via PubChem
Danger Toxic pictogram (GHS06) and Health hazard pictogram (GHS08); hazard statements H300, H330, H373, H413
Groups it belongs to
- Category
- Element & material
- Family
- Chemical elements
- Hazard classes
- Acutely toxic, Health hazard, GHS Danger
SMILES
[Tl]PubChem CID 5359464 · Wikidata Q932 · InChIKey BKVIYDNLLOSFOA-UHFFFAOYSA-N · Data refreshed
Questions
- What is Thallium?
- A heavy metal once sold as rat poison and now banned for it, tasteless and slow enough that it became a favourite of poisoners in fiction. Element 81.
- How toxic is Thallium?
- Its GHS hazard label carries the signal word Danger and the hazard pictograms Toxic and Health hazard. from source
- What kind of molecule is Thallium?
- Thallium has the formula Tl and a molecular weight of 204.383 g/mol. MoleculeFinder files it under chemical elements, in the element & material group. from sourcefrom sourcefrom sourcefrom source
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- Hazard labelfrom sourceECHA, EU CLP Regulation, Safe Work Australia via PubChemThe label combines these classifications.
- ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
- EU CLP Regulationfrom sourceAttributionSource: EUR-Lex, Regulation (EC) No 1272/2008, © European Union.
- Safe Work Australiafrom sourceAttributionSource: Safe Work Australia, Hazardous Chemical Information System, © Commonwealth of Australia, CC BY 4.0.
- Data refreshedfrom sourceMoleculeFinder2026-11-09