Formula: Kr
A colorless, odorless, nonflammable, inert gas
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Applications
- A major use is in the lighting industry. Used in incandescent lamps, mixed with nitrogen and argon or nitrogen, argon and xenon. Used in mixtures with argon as a filling gas for fluorescent tubes. Used as a filling gas for various halogen lamps, such as those used in cars, on airfields and in low voltage display lamps.
- Used to obtain brain X-ray pictures.
- Used as a triggering agent in discharge type electronic tubes.
- Used as an insulation gas in windows to reduce noise and heat transfer.
- Used for certain ion and excimer lasers.
- Krypton is also used for mass spectrometry and specific area measurements in adsorption applications.
Nitrogen < 15 ppmv< 4 ppmv
| Grade 4 | Grade 4.5 | Grade 5 | |
|---|---|---|---|
| Purity | 99.99% | 99.995% | 99.999% |
| Air (N2+O2+CO+CO2) | < 40 ppmv | ||
| Oxygen | < 2 ppmv | < 0.5 ppmv | |
| Carbon Monoxide | < 1 ppmv | < 0.5 ppmv | |
| Carbon Dioxide | < 1 ppmv | < 0.5 ppmv | |
| Moisture | < 10 ppmv | < 2 ppmv | < 2 ppmv |
| Total Hydrocarbons | < 1 ppmv | < 0.5 ppmv | |
| Xenon | < 20 ppmv | < 2 ppmv | |
| CF4 | < 50 ppmv | < 0.1 ppmv | |
| Sulfur Hexafluoride | < 0.1 ppmv | ||
| Halocarbon 116 | < 0.1 ppmv |
**Moisture level guaranteed only when Electronic Fluorocarbons prepares the cylinders.
All concentrations are on a mol/mol basis unless otherwise stated.
Product sold on the basis of total impurities. Individual impurities may vary slightly.
| Chemical & Physical Properties | |
| Molecular Weight | 83.80 |
| Specific Volume | 4.6 cu.ft/lb |
| Pressure @ 70 deg | 2400 psia |
| Valve Outlet | CGA 580 |
| Shipping Data | |
| DOT Name | Krypton |
| Hazard Class | 2.2 |
| DOT No. | UN 1056 |
| DOT Label | Green, non-flammable gas |
| CAS No. | 74390-90-9 |
| Cylinder Size | Fill Volume (L) |
| 49L/Size 300 | 10,000 |
| 44L/Size 200 | 7000 |
| 16L/Size 80 | 2000 |
| 7L/Size 35 | 500 |
*This gas not available for purchase online.
