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NIOSH

HYDROGEN

ICSC: 0001
H2
Molecular mass: 2.0
(cylinder)
ICSC # 0001 		CAS # 1333-74-0
RTECS # MW8900000
UN # 1049
EC # 001-001-00-9
June 03, 2002 Validated

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; in other cases extinguish with 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 Suffocation.
Closed system and ventilation.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
•SKIN Serious frostbite.
Cold-insulating gloves.
Refer for medical attention.
•EYES
Safety spectacles.

•INGESTION


SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Remove all ignition sources. Evacuate danger area! Consult an expert! Ventilation. Remove vapour with fine water spray.
Fireproof. Cool.

F+ symbol
R: 12
S: 2-9-16-33
UN Hazard Class: 2.1
ICSC: 0001 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

HYDROGEN

ICSC: 0001

I

M

P

O

R

T

A

N

T


D

A

T

A

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 air, oxygen , halogens and strong oxidants causing fire and explosion hazard. Metal catalysts, such as platinum and nickel, greatly enhance these reactions.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: Simple asphyxiant (ACGIH 2002).


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

INHALATION RISK:
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
Simple asphyxiant. See Notes.

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


N O T E S

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).
Transport Emergency Card: TEC (R)-20S1049

NFPA Code: H0; F4; R0;

ADDITIONAL INFORMATION



ICSC: 0001 HYDROGEN
(C) IPCS, CEC, 1994
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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