| CAS No.: | 7439-90-9 |
|---|---|
| Formula: | Kr |
| EINECS: | 231-098-5 |
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Description:
Krypton, like the other noble gases, is used in lighting and photography. Krypton light has many spectral lines, and krypton plasma is useful in bright, high-powered gas lasers, each of which resonates and amplifies a single spectral line. Krypton fluoride also makes a useful laser.
Earth has retained all of the noble gases that were present at its formation except helium. Krypton's concentration in the atmosphere is about 1 ppm. It can be extracted from liquid air by fractional distillation. The amount of krypton in space is uncertain, because measurement is derived from meteoric activity and solar winds. The first measurements suggest an abundance of krypton in space.
Krypton's multiple emission lines make ionized krypton gas discharges appear whitish, which in turn makes krypton-based bulbs useful in photography as a brilliant white light source. Krypton is used in some photographic flashes for high speed photography. Krypton gas is also combined with other gases to make luminous signs that glow with a bright greenish-yellow light.
Specifications:
| Component | Specification | Concentration |
| KRYPTON | 99.999% | >99.999% |
| HYDROGEN(H2) | ≤0.5 ppm | ≤0.5 ppm |
| OXYGEN+AIR (O2+Ar) | ≤1.5 ppm | ≤1.5 ppm |
| NITROGEN (N2) | ≤2.0ppm | ≤2.0 ppm |
| CARBON MONOXIDE (CO) | ≤0.3ppm | ≤0.3ppm |
| CARBON DIOXIDE(CO2) | ≤0.4ppm | ≤0.4 ppm |
| CH4 | ≤0.3 ppm | ≤0.3 ppm |
| XENON(Xe) | ≤2.0 ppm | ≤2.0 ppm |
| MOISTURE (H2O) | ≤2.0 ppm | ≤2.0 ppm |
| TETRAFLUOROMETHANE (CF4) | ≤1.0 ppm | ≤1.0 ppm |
Physical properites
| Physical properties | |
| Chemical name | kr |
| Molecular weight | 83.80 |
| Density of the gas at 70°F (21,1°C), 1 atm | 0.2172 lb/ft3, 3.479 kg/m3 |
| Specific gravity of the gas at 70°F (21 ,1°C), 1 atm | 2.899 |
| Specific volume of the gas at 70ºF (21,1°C), 1 atm | 4.604 ft3/lb, 0.287 m3/kg |
| Boiling point at 1 atm | -244.0ºF, -153.4ºC |
| Melting point at 1 atm | -251º F, -157ºC |
| Critical temperature at 1 atm | -82.8ºF, -63.8ºC |
| Critical density | 56.7 lb/ft3, 908 kg/m3 |
| Critical pressure | 798.0 psia, 55.02 bar |
| Triple point | -251.3ºF, -157.4ºC |
| Latent heat of vaporization at normal boiling point | 46.2 Btu/lb, 107.5 kJ/kg |
| Latent heat of fusion at triple point | 8.41 Btu/lb, 19.57 kJ/kg |
|
Specific heat of the gas at 70ºF (21,1°C), 1 atm Cp Cv |
0.060 Btu/(lb) (ºF) 0.251 kJ/(kg) (ºC) 0.035 Btu/(lb) (ºF) 0.146 kJ/(kg) (ºC) |
Applications:
1. Krypton is used in some photographic flashes for high speed photograph.
2. Krypton gas is also combined with other gases to make luminous signs that glow with a bright
greenish-yellow light.
3. Krypton is mixed with argon in energy efficient fluorescent lamps, reducing the power consumption,
but also reducing the light output and raising the cost.
4. Krypton (along with xenon) is also used to fill incandescent lamps to reduce filament evaporation and
allow higher operating temperatures.A brighter light results with more blue color than conventional
incandescent lamps.
5. Krypton's white discharge is often used to good effect in colored gas discharge tubes, which are simply
painted or stained to create the desired color (for example, "neon" type multi-colored advertising signs
are often entirely krypton-based).
6. Krypton-83 has application in magnetic resonance imaging (MRI) for imaging airways. In particular, it
enables the radiologist to distinguish between hydrophobic and hydrophilic surfaces containing an
airway.
Packaging & Shipping
Product Information
FAQ
1.What's your product price?
Because each gas price is depends on the market supply and demand, quantity and purity, it is difficult to give a fixed price. If you have any interested in each gas, pls give your details requirement. I could like to make an offer to you.
2.What's the min order?
Different products have different min order. Please don't hesitate to let me know your requirement.
3.What's the delivery time?
If the cylinder is in stock, and only need to fill gas, the delivery is about 7-10 days ex work after receive the deposit.
If the cylinder need to customize, the delivery is about 15-35 days ex work after receive the deposit. That depends on the quantity.
4.How to check the gas quality?
Firstly, our cylinder will take a treatment (cleaning, drying, vacuum pumping, and replacement before filling gas. In this way, the cylinder inside is clear and dry. Secondly, we will take tests every treated cylinder to assure them inside purity. Thirdly, we will take a test for all of the gas after fill into cylinders. If the tested gas is not up to standard, we will produce it again and not release the faulty product to ex work. At last, we will supply you the gas testing qualified report .
5.All the cylinders can be recycled?
Usually seamless steel cylinder can be recycled to use in 20 years.
The disposable cylinder is only use for one time.
6.Shall we send back the cylinders to China to refill gas again?
Yes, when you ordered our cylinders, next time, you can send back the cylinders to fill gas again. You just need to tell us before you export. We will handle all the import customs clearance formalities.
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