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2,2-DIMETHYLPROPANE
(cylinder)
ICSC: 1773
Peer-Review Status: 11.04.2014 Validated
Tetramethylmethane
tert-Pentane
Neopentane
1,1,1-Trimethylethane
CAS #: 463-82-1 UN #: 2044
EC #: 601-005-00-6
EINECS #: 207-343-7
    Formula: C5H12
Molecular mass: 72.2

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Extremely flammable.  NO open flames, NO sparks and NO smoking.  Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with powder, foam, carbon dioxide. 
EXPLOSION Gas/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  In case of fire: keep cylinder cool by spraying with water. 
 
EXPOSURE      
Inhalation Dizziness. Drowsiness. Headache.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin ON CONTACT WITH LIQUID: FROSTBITE.  Cold-insulating gloves.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. 
Eyes ON CONTACT WITH LIQUID: FROSTBITE.  Wear safety goggles or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer for medical attention. 
Ingestion      

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Remove all ignition sources. Consult an expert! Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Shut off cylinder if possible. Isolate the area until the gas has dispersed. Remove gas with fine water spray.   
EC Classification
Symbol: F+, N; R: 12-51/53; S: (2)-9-16-33-61 
UN Classification
UN Hazard Class: 2.1 
GHS Classification
Signal: Danger
Extremely flammable gas
Contains gas under pressure; may explode if heated
May cause drowsiness or dizziness 
flam;flamecylinder;gasexcl mark;warn

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F4; R0.  Fireproof. Cool. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS COMPRESSED GAS WITH CHARACTERISTIC ODOUR. 

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible. The gas mixes well with air, explosive mixtures are easily formed. 

Chemical dangers
Reacts with strong oxidants. 

Occupational exposure limits
TLV: 600ppm as TWA; (ACGIH 2014).
EU OEL: 1000ppm, 3000mg/m³ as TWA;. 

Routes of exposure
 

Inhalation risk
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly, especially in confined spaces. 

Effects of short-term exposure
Inhalation of high concentrations of the gas may cause depression of the central nervous system. Rapid evaporation of the liquid may cause frostbite. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 9.5°C
Melting point: -16.6°C
Density (at 20°C): 0.61 g/cm³
Flash point: <-7°C
Auto-ignition temperature: 450°C
Explosive limits, vol% in air: 1.3 - 7.5
Solubility in water: none
Vapour pressure, kPa at 20°C: 146
Relative vapour density (air = 1): 2.5
Octanol/water partition coefficient as log Pow: 3.11  
 

NOTES
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering the area. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations