International Chemical Safety Cards

HYDROGEN ICSC: 0001
HYDROGEN
(cylinder)
H2
Molecular mass: 2.0
CAS # 1333-74-0
RTECS # MW8900000
ICSC # 0001
UN # 1049
EC # 001-001-00-9
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Extremely flammable. Many reactions may cause fire or explosion.
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; (see notes) water spray, powder, carbon dioxide.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools. Do not handle cylinders with oily hands.
In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.
 
EXPOSURE


INHALATION Dizziness. Asphyxia. Laboured breathing. Unconsciousness.
Closed system and ventilation.
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
Safety goggles, or face shield.

INGESTION


SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Remove vapour with fine water spray.
Fireproof. Cool.

F+ symbol
R: 12
S: 9-16-33
UN Hazard Class: 2.1
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0001 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

HYDROGEN ICSC: 0001

I
M
P
O
R
T
A
N
T

D
A
T
A
PHYSICAL STATE; APPEARANCE:
ODOURLESS , COLOURLESS COMPRESSED LIQUEFIED 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 air, oxygen, chlorine, fluorine, strong oxidants causing fire and explosion hazard. Metal catalysts, such as platinum and nickel, greatly enhance these reactions.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV not established


 ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
On loss of containment this liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas.

EFFECTS OF SHORT-TERM EXPOSURE:
The liquid may cause frostbite. Exposure could cause dizzines, high voice. Exposure may result in suffocation.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES		 Boiling point: - 253°C
Relative vapour density (air = 1): 0.07
Flash point: flammable gas
Auto-ignition temperature: 500-571°C
Explosive limits, vol% in air: 4-76%
ENVIRONMENTAL
DATA
NOTES
Addition of small amounts of a flammable substance or an increase in the oxygen content of the air strongly enhances combustibility. High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. Check oxygen content before entering area. No odour warning if toxic concentrations are present. Measure hydrogen concentrations with suitable gas detector (a normal flammable gas detector is not suited for the purpose). After use for welding, turn valve off; regularly check tubing, etc., and test for leaks with soap and water. The measures mentioned in section PREVENTION are applicable to production, filling of cylinders, and storage of the gas.
Transport Emergency Card: TEC (R)-20
NFPA Code: H0; F4; R0;
ADDITIONAL INFORMATION


ICSC: 0001 HYDROGEN
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.