| Formula / Notation | Re |
|---|---|
| CAS Number | 7440-15-5 |
| Molecular Weight | 186.21 |
| Melting Point | 3186.0 |
| Boiling Point | 5596.0 |
| Density | 21.04 |
| Solubility | Insoluble in water |
| Appearance | Dense, silvery-grey, lustrous metal |
| Also Known As | Re, rhenium metal |
| Category | Elements |
What is Rhenium?
Rhenium is a dense, silvery-grey transition metal, atomic number 75. One of the rarest elements in Earth crust. Has the second highest melting point after tungsten. Critical component of nickel-based superalloys for jet engine turbine blades.
Formula & Notation
IUPAC Name: Rhenium
Other Names / Synonyms: Re, rhenium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 3186.0 |
| Boiling Point | 5596.0 |
| Density | 21.04 |
| Molecular Weight | 186.21 |
| Solubility | Insoluble in water |
| Appearance | Dense, silvery-grey, lustrous 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
Rhenium is a dense, silvery-grey transition metal, atomic number 75. One of the rarest elements in Earth crust. Has the second highest melting point after tungsten. Critical component of nickel-based superalloys for jet engine turbine blades.
Nickel superalloy additive for jet turbine blades (single-crystal turbine blades contain up to 6% Re). Platinum-rhenium catalysts for petroleum reforming. Filaments in mass spectrometers and ion gauges. Re-186 and Re-188 for cancer radiotherapy. Thermocouples (W-Re).
Rhenium metal: low acute toxicity. Rhenium compounds: moderate toxicity. Rhenium oxide dust: irritant. Re-186, Re-188: radioactive beta emitters - radiation precautions. Very expensive metal - handle carefully to avoid waste.
The formula or notation for Rhenium is: Re