| Formula / Notation | Tl |
|---|---|
| CAS Number | 7440-28-0 |
| Molecular Weight | 204.38 |
| Melting Point | 304.0 |
| Boiling Point | 1473.0 |
| Density | 11.85 |
| Solubility | Slightly soluble (soluble as Tl+ salts) |
| Appearance | Soft, silvery-grey metal |
| Also Known As | Tl, thallium metal |
| Category | Elements |
What is Thallium?
Thallium is a soft, grey post-transition metal, atomic number 81. Extremely toxic - tasteless, odourless thallium salts have been used as rat poison and murder weapon. Thallium-201 is used in cardiac stress tests in nuclear medicine.
Formula & Notation
IUPAC Name: Thallium
Other Names / Synonyms: Tl, thallium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 304.0 |
| Boiling Point | 1473.0 |
| Density | 11.85 |
| Molecular Weight | 204.38 |
| Solubility | Slightly soluble (soluble as Tl+ salts) |
| Appearance | Soft, silvery-grey metal |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Thallium is a soft, grey post-transition metal, atomic number 81. Extremely toxic - tasteless, odourless thallium salts have been used as rat poison and murder weapon. Thallium-201 is used in cardiac stress tests in nuclear medicine.
Tl-201 cardiac SPECT imaging (stress tests). Infrared optics (thallium bromide-iodide). Thallium doped caesium iodide scintillators. Rodenticide (now mostly banned). Superconductors (Tl-Ba-Ca-Cu-O). Low-melting glass.
Extremely toxic - LD50 ~15 mg/kg. Tl+ ions mimic K+ - disrupts potassium-dependent processes. Causes hair loss, peripheral neuropathy, organ failure. Tasteless and odourless - classic untraceable poison. Thallium-201: low-level radioactive, radiation precautions needed. Strict regulatory control in …
The formula or notation for Thallium is: Tl