ICSC 0001 - HYDROGEN

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HYDROGEN	ICSC: 0001 (April 2014)

CAS #: 1333-74-0

UN #: 1049

EC Number: 215-605-7

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Extremely flammable. Many reactions may cause fire or explosion. Gas/air mixtures are explosive.	NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools. Do not handle cylinders with oily hands.	Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray, powder, carbon dioxide. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.

Use appropriate engineering controls.
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Dizziness. Headache. Lethargy. Suffocation.	Use ventilation.	Fresh air, rest.
Skin	ON CONTACT WITH GAS: FROSTBITE.	Cold-insulating gloves.	ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer immediately for medical attention.
Eyes	ON CONTACT WITH GAS: FROSTBITE.	Wear face shield.	ON FROSTBITE: rinse with plenty of water. Refer immediately for medical attention.
Ingestion

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. Remove vapour with fine water spray.	According to UN GHS Criteria DANGER Extremely flammable gas Contains gas under pressure; may explode if heated Transportation UN Classification UN Hazard Class: 2.1
STORAGE
Fireproof. Cool. Ventilation along the floor and ceiling. Separated from oxidizing materials.
PACKAGING

HYDROGEN

ICSC: 0001

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance ODOURLESS COLOURLESS COMPRESSED GAS. Physical dangers The gas mixes well with air, explosive mixtures are easily formed. The gas is lighter than air. Chemical dangers Heating may cause violent combustion or explosion. Reacts violently with halogens, oxidizing materials and greases. This generates fire and explosion hazard. Metal catalysts, such as platinum and nickel, greatly enhance these reactions.	Formula: H₂ Molecular mass: 2.0 Boiling point: -253°C Melting point: -259°C Relative vapour density (air = 1): 0.07 Flash point: Flammable gas Auto-ignition temperature: 560°C Explosive limits, vol% in air: 4-75 Vapour pressure, kPa at 25°C: 165320 Solubility in water, mg/l at 21°C: 1.62 (very poor)

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
ODOURLESS COLOURLESS COMPRESSED GAS.

Physical dangers
The gas mixes well with air, explosive mixtures are easily formed. The gas is lighter than air.

Chemical dangers
Heating may cause violent combustion or explosion. Reacts violently with halogens, oxidizing materials and greases. This generates fire and explosion hazard. Metal catalysts, such as platinum and nickel, greatly enhance these reactions.

Formula: H₂
Molecular mass: 2.0
Boiling point: -253°C
Melting point: -259°C
Relative vapour density (air = 1): 0.07
Flash point: Flammable gas
Auto-ignition temperature: 560°C
Explosive limits, vol% in air: 4-75
Vapour pressure, kPa at 25°C: 165320
Solubility in water, mg/l at 21°C: 1.62 (very poor)

EXPOSURE & HEALTH EFFECTS
Routes of exposure Exposure mainly occurs via inhalation. Effects of short-term exposure Asphyxiation. See Notes. Exposure to cold gas could cause frostbite.	Inhalation risk On loss of containment this substance can cause suffocation by lowering the oxygen content of the air in confined areas. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
Exposure mainly occurs via inhalation.

Effects of short-term exposure
Asphyxiation. See Notes. Exposure to cold gas could cause frostbite.

Inhalation risk
On loss of containment this substance can cause suffocation by lowering the oxygen content of the air in confined areas.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT

NOTES
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. Check oxygen content before entering area. Measure hydrogen concentrations with suitable gas detector (a normal flammable gas detector is NOT suitable for the purpose).

ADDITIONAL INFORMATION

EC Classification
Symbol: F+; R: 12; S: (2)-9-16-33

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