Oxygen, liquid

  • Oxygen, refrigerated liquid (cryogenic liquid)
  • Liquid oxygen
  • LOX
Formula
O2
Structure
Description
Oxygen is a colorless, odorless and tasteless gas. As a non-liquid gas it is shipped at pressures of 2000 psig or above.
Uses
Manufacture of synthesis gas for prodn of ammonia, methyl alcohol, acetylene, etc, to counteract effect of eutrophication in lakes & reservoirs, coal gasification.

Registry Numbers and Inventories.
CAS
7782-44-7
EC (EINECS/ELINCS)
231-956-9
EC Index Number
008-001-00-8
EC Class
Oxidising
RTECS
RS2060000
RTECS class
Mutagen; Reproductive Effector; Human Data
UN (DOT)
1073
Merck
12,7098
Beilstein/Gmelin
485 (G)
Swiss Giftliste 1
G-6770
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
O2
Formula mass
31.99
Melting point, °C
-218.3
Boiling point, °C
-183.17
Vapor pressure, mmHg
1905 (-173 C)
Vapor density (air=1)
1.43
Odor Threshold Odor threshold Odorless
Critical temperature
-118.95
Critical pressure
50.14
Density
1.14 g/cm3 (20 C)
Solubility in water
Very soluble
Viscosity
gas: 1 atm at 25C (0.020 75 cp)
Surface tension
13.47 g/s2
Dipole moment
0.154 D
Dielectric constant
1.465
Partition coefficient, pKow
-0.53
Heat of fusion
0.45 kJ/mol
Heat of vaporization
6.8 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
Keep sparks, flames, and other sources of ignition away. Attempt to stop leak if without undue personnel hazard. Do not use water on material itself.
Stability
No data.

Fire.
Fire fighting
Dangerously explosive. Cool all affected containers with flooding quantities of water. Do not use water on material itself. Apply water from as far a distance as possible.
Fire potential
Substance does not burn but will support combustion.
Hazards
Some may react explosively with fuels. May ignite combustibles (wood, paper, oil, clothing, etc.). Vapors from liquefied gas are initially heavier than air and spread along ground. Runoff may create fire or explosion hazard. Containers may explode when heated. Ruptured cylinders may rocket.
Health
3
 
Flammability
0
 
 
Reactivity
0
 
 
Special
O

Health.
Poison_Class
-
Exposure effects
Significant dermal exposure to the escaping compressed gas or liquid oxygen may cause reduced body temperature. Seizures - central nervous system involvement in hyperbaric situations may pose a significant threat to safety.
   Ingestion
Necrotizing enterocolitis in premature neonates may be, at least partially, caused by oxygen-generated free radicals.
   Inhalation
Vapors may cause dizziness or asphyxiation without warning.
   Skin
Direct contact with the escaping compressed gas or liquid oxygen may cause frostbite injury to the skin.
   Eyes
Vision loss, myopia, nuclear cataracts, retrolental fibroplasia, and ocular frostbite injury may occur under various conditions of oxygen exposure. Sinus mucosal inflammation, and pharyngeal edema may occur with oxygen administration.

First aid
 
   Ingestion
Unlikely route of exposure - because oxygen is a gas at ambient temperatures, ingestion is an unlikely route of exposure.
   Inhalation
In all but the most severe cases (pneumonia), recovery is rapid after reduction of oxygen pressure; supportive treatment should include immediate sedation, anticonvulsive therapy if needed, and rest.
   Skin
Treat frostbite; soak in lukewarm water.
   Eyes
Treat frostbite burns.

Transport.
UN number
1073
Response guide
Hazard class
2.2
USCG CHRIS Code
OXY
 
Std. Transport #
4904360