Krypton, refrigerated liquid (cryogenic liquid)

Formula
Kr
Structure
Description
Krypton is a colorless, odorless gas.
Uses
Used as a gas filler in special purpose electric bulbs.

Registry Numbers and Inventories.
CAS
7439-90-9
EC (EINECS/ELINCS)
231-098-5
RTECS
OC6772500
UN (DOT)
1056
Merck
12,5335
Beilstein/Gmelin
16201 (G)
Swiss Giftliste 1
G-9571
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
Kr
Formula mass
83.80
Melting point, °C
-157.4
Boiling point, °C
-153.4
Vapor density (air=1)
2.89
Density
0.003425 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
2.5405E-05 cp (273.15 C)
Thermal expansion
0.0032/K
Heat of fusion
1.4 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Attempt to stop leak if without undue personnel hazard.
Stability
No data.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
Non-flammable gas.
Hazards
Containers may explode when heated. Ruptured cylinders may rocket.

Health.
Poison_Class
-
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
Unlikely route of exposure.
   Inhalation
Vapors may cause dizziness or asphyxiation without warning.
   Skin
Contact with liquefied gas may cause frostbite.
   Eyes
See Skin.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
1056
Response guide
Hazard class
2.2
Std. Transport #
4904573