ICSC 0901 - ISOBUTANE

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ISOBUTANE	ICSC: 0901 (November 1998)
2-Methylpropane 1,1-Dimethylethane Trimethylmethane

CAS #: 75-28-5

UN #: 1969

EC Number: 200-857-2

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Extremely flammable. Gas/air mixtures are explosive.	NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state.	Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Shortness of breath. Suffocation.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	ON CONTACT WITH LIQUID: FROSTBITE.	Cold-insulating gloves. Protective clothing.	ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention .
Eyes		Wear safety goggles or face shield.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion		Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. NEVER direct water jet on liquid. Personal protection: filter respirator for organic vapours of low boiling point adapted to the airborne concentration of the substance.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 2.1
STORAGE
Fireproof. Cool.
PACKAGING

ISOBUTANE

ICSC: 0901

PHYSICAL & CHEMICAL INFORMATION
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. This generates fire and explosion hazard.	Formula: C₄H₁₀ / (CH₃)₂CHCH₃ Molecular mass: 58.1 Boiling point: -12°C Melting point: -160°C Relative density (water = 1): 0.6 (liquid) Solubility in water at 20°C: none Vapour pressure, kPa at 20°C: 304 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

PHYSICAL & CHEMICAL INFORMATION

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. This generates fire and explosion hazard.

Formula: C₄H₁₀ / (CH₃)₂CHCH₃
Molecular mass: 58.1
Boiling point: -12°C
Melting point: -160°C
Relative density (water = 1): 0.6 (liquid)
Solubility in water at 20°C: none
Vapour pressure, kPa at 20°C: 304
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

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the cardiovascular system. This may result in impaired functions and respiratory failure. Exposure at high levels could cause death.	Inhalation risk A harmful concentration of this gas in the air will be reached very quickly on loss of containment. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation.

Effects of short-term exposure
Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the cardiovascular system. This may result in impaired functions and respiratory failure. Exposure at high levels could cause death.

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
TLV: 1000 ppm as STEL. MAK: 2400 mg/m³, 1000 ppm; peak limitation category: II(4); pregnancy risk group: D

ENVIRONMENT

NOTES
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.

ADDITIONAL INFORMATION

EC Classification
Symbol: F+; R: 12; S: (2)-9-16; Note: C

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