Liquefied natural gas

  • LNG
  • Methane, refrigerated liquid (cryogenic liquid)
  • Natural gas, refrigerated liquid (cryogenic liquid)
Formula
Unspecified
Description
Colorless, odorless gas or liquid. A complex combination of hydrocarbons consisting of aliphatic hydrocarbons having carbon numbers in the range of C1-C4, predominantly methane and ethane.
Uses
Fuel gas.

Registry Numbers and Inventories.
CAS
68410-63-9
EC (EINECS/ELINCS)
270-085-9
UN (DOT)
1971
Beilstein/Gmelin
NA
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Melting point, °C
-183
Boiling point, °C
-162
Vapor density (air=1)
0.555
Solubility in water
Slightly soluble

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. Ground all lines and equipment used around the material.
A B1
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. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stability
No data.
Incompatibilities
Oxidizers, halogens, air.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
-188
Autoignition, °C
537
Upper exp. limit, %
17.0
Lower exp. limit, %
3.6
Fire fighting
Wear self-contained breathing apparatus and full protective gear. Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
Flammable gas.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket.
Combustion products
Oxides of carbon.
Health
1
 
Flammability
4
 
 
Reactivity
0
 

Health.
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. Some may be irritating if inhaled at high concentrations.
   Skin
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
   Eyes
May cause irritation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Clothing frozen to the skin should be thawed before being removed. In case of contact with liquefied gas, thaw frosted parts with lukewarm water
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
1971
Response guide
Hazard class
2.1
USCG CHRIS Code
LNG
 
Std. Transport #
4905756
 
IMO Gas Code
B