| Formula / Notation | Kr |
|---|---|
| CAS Number | 7439-90-9 |
| Molecular Weight | 83.8 |
| Melting Point | -157.4 |
| Boiling Point | -153.4 |
| Density | 0.00375 |
| Solubility | 110 mg/L at 0 C |
| Appearance | Colourless, odourless monatomic gas |
| Also Known As | Kr, krypton gas |
| Category | Elements |
What is Krypton?
Krypton is a colourless, odourless noble gas, atomic number 36. Chemically inert under normal conditions. Used in lighting and as a standard of length. Named from the Greek kryptos meaning hidden. One of the rarest stable elements.
Formula & Notation
IUPAC Name: Krypton
Other Names / Synonyms: Kr, krypton gas
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | -157.4 |
| Boiling Point | -153.4 |
| Density | 0.00375 |
| Molecular Weight | 83.8 |
| Solubility | 110 mg/L at 0 C |
| Appearance | Colourless, odourless monatomic gas |
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
Krypton is a colourless, odourless noble gas, atomic number 36. Chemically inert under normal conditions. Used in lighting and as a standard of length. Named from the Greek kryptos meaning hidden. One of the rarest stable elements.
High-intensity lighting (krypton flash lamps). Energy-saving light bulbs. Krypton-85 in leak detection. Nuclear industry (Kr-85 fission product as tracer). Laser medium. Historical SI definition of metre (Kr-86 wavelength).
Asphyxiation hazard in enclosed spaces. Cryogenic liquid krypton: cold burns. Krypton-85: radioactive fission product, beta/gamma emitter. Otherwise chemically inert and non-toxic.
The formula or notation for Krypton is: Kr