2-Methylpropane
1,1-Dimethylethane
Trimethylmethane
C4H10 / (CH3)2CHCH3
Molecular mass: 58.1
(cylinder)
ICSC # 0901
CAS # 75-28-5
RTECS # TZ4300000
UN # 1969
EC # 601-004-00-0
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Extremely flammable.
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NO open flames, NO sparks, and NO smoking.
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Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with
water spray.
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Explosion
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Gas/air mixtures are explosive.
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Closed system, ventilation, explosion-proof electrical equipment and lighting.
Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state.
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In case of fire: keep cylinder cool by spraying with water.
Combat fire from a sheltered position.
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Exposure
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•Inhalation
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Shortness of breath.
Suffocation.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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ON CONTACT WITH LIQUID: FROSTBITE.
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Cold-insulating gloves.
Protective clothing.
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ON FROSTBITE: rinse with plenty of water, do NOT remove clothes.
Refer for medical attention.
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•Eyes
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Safety goggles,
face shield.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Evacuate danger area!
Consult an expert!
Ventilation.
Remove all ignition sources.
NEVER direct water jet on liquid.
(Extra personal protection: filter respirator for organic vapours of low boiling compounds).
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Fireproof.
Cool.
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Note: C
F+ symbol
R: 12
S: 2-9-16
UN Hazard Class: 2.1
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Important Data
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Physical State; Appearance:
COLOURLESS COMPRESSED LIQUEFIED GAS
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The gas is heavier than air
and may travel along the ground; distant ignition possible.
As a result of flow, agitation, etc., electrostatic charges can be generated.
Chemical Dangers:
Reacts with strong oxidants, acetylene, halogens and nitrogen oxides
causing fire and explosion hazard.
Occupational Exposure Limits:
TLV: (Aliphatic hydrocarbon gases, Alkane C1-C4) 1000 ppm
(as TWA)
(ACGIH 2006).
MAK: 1000 ppm, 2400 mg/m3
Peak limitation category: II(4); Pregnancy risk group: D;
(DFG 2008).
OSHA PEL: none
NIOSH REL: TWA 800 ppm (1900 mg/m3)
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation.
Inhalation Risk:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.
Effects of Short-Term Exposure:
Rapid evaporation of the liquid may cause frostbite.
The substance may cause effects on the cardiovascular system
, resulting in impaired functions and respiratory failure.
Exposure at high level may result in death.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: -12°C
Melting point: -160°C
Relative density (water = 1): 0.6 (when liquid)
Solubility in water, g/100 ml at 20°C: none
Vapour pressure, kPa at 20°C: 304
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Relative vapour density (air = 1): 2
Flash point: Flammable Gas
Auto-ignition temperature: 460°C
Explosive limits, vol% in air: 1.8-8.4
Octanol/water partition coefficient as log Pow: 2.8
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Environmental
Data
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N O T E S
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Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
The measures mentioned in section Prevention are applicable to production, filling of cylinders, and storage of the gas.
Transport Emergency Card: TEC (R)-501
NFPA Code: H1; F4; R0;
Card has been partially updated in November 2008: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0901
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ISOBUTANE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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