SIGMA-ALDRICH
Material Safety Data Sheet
Date Printed: 09/AUG/2005
Date Updated: 12/MAR/2004
Version 1.2
According to 91/155/EEC
Classified as Hazardous according to the criteria of EU Annex 1 and
NOHSC.
1 - Product and Company Information
Product Name HYDROGEN, 99.99+%
Product Number 295396
Company Sigma-Aldrich Pty. Ltd.
12 Anella Avenue
Castle Hill NSW 2154
Technical Phone # +61 2 9841 0555 (1800 800 097)
Fax +61 2 9841 0500 (1800 800 096)
Emergency Phone # +44 8701906777 (1800 448 465)
2 - Composition/Information on Ingredients
Product Name CAS # EC no Annex I
Index Number
HYDROGEN 1333-74-0 215-605-7 001-001-00-9
Formula H2
Molecular Weight 2.02 AMU
Synonyms Hydrogen (ACGIH:OSHA)
3 - Hazards Identification
SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT
Extremely flammable.
4 - First Aid Measures
AFTER INHALATION
If inhaled, remove to fresh air. If not breathing give
artificial respiration. If breathing is difficult, give oxygen.
AFTER SKIN CONTACT
In case of contact, immediately wash skin with soap and copious
amounts of water.
AFTER EYE CONTACT
Contamination of the eyes should be treated by immediate and
prolonged irrigation with copious amounts of water. Assure
adequate flushing of the eyes by separating the eyelids with
fingers.
AFTER INGESTION
If swallowed, wash out mouth with water provided person is
conscious. Call a physician.
5 - Fire Fighting Measures
EXTINGUISHING MEDIA
Suitable: Use water spray or fog nozzle to keep cylinder cool.
Move cylinder away from fire if there is no risk.
SPECIAL RISKS
Specific Hazard(s): Extremely flammable. Vapor may travel
considerable distance to source of ignition and flash back.
Emits toxic fumes under fire conditions.
Explosion Hazards: May form explosive mixtures with air Vapor
may travel considerable distance to source of ignition and flash
back. Container explosion may occur under fire conditions.
SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS
Wear self-contained breathing apparatus and protective clothing
to prevent contact with skin and eyes.
SPECIFIC METHOD(S) OF FIRE FIGHTING
Do not extinguish burning gas if flow cannot be shut off
immediately. Use water spray or fog nozzle to keep cylinder
cool. Move cylinder away from fire if there is no risk.
6 - Accidental Release Measures
PERSONAL PRECAUTION PROCEDURES TO BE FOLLOWED IN CASE OF LEAK OR SPILL
Evacuate area and keep personnel upwind. Shut off all sources of
ignition. Shut off leak if there is no risk.
PROCEDURE(S) OF PERSONAL PRECAUTION(S)
Wear self-contained breathing apparatus, rubber boots, and heavy
rubber gloves.
METHODS FOR CLEANING UP
Ventilate area and wash spill site after material pickup is
complete.
7 - Handling and Storage
HANDLING
Directions for Safe Handling: Do not breathe gas. Do not get in
eyes, on skin, on clothing. Avoid prolonged or repeated exposure.
STORAGE
Conditions of Storage: Keep tightly closed. Keep away from heat,
sparks, and open flame. Use with equipment rated for cylinder
pressure, and of compatible materials of construction. Close
valve when not in use and when empty. Make sure cylinder is
properly secured when in use or stored Cylinder temperature
should not exceed 125藲F (52藲C).
Unsuitable: Store away from heat and direct sunlight
SPECIAL REQUIREMENTS: Contents under pressure.
8 - Exposure Controls / Personal Protection
ENGINEERING CONTROLS
Warning: suck-back into cylinder may cause rupture. Use
back-flow-preventive device in piping.
GENERAL HYGIENE MEASURES
Wash contaminated clothing before reuse. Wash thoroughly after
handling.
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PERSONAL PROTECTIVE EQUIPMENT
Respiratory Protection: Government approved respirator in
nonventilated areas and/or for exposure above the TLV or PEL.
Hand Protection: Compatible chemical-resistant gloves.
Eye Protection: Chemical safety goggles.
9 - Physical and Chemical Properties
Appearance Physical State: Compressed gas
Color: Colorless
Property Value At Temperature or Pressure
pH N/A
BP/BP Range -252.8 藲C 760 mmHg
MP/MP Range -259.2 藲C
Flash Point N/A
Flammability N/A
Autoignition Temp 571 藲C
Oxidizing Properties N/A
Explosive Properties N/A
Explosion Limits Lower: 4 %
Upper: 74.2 %
Vapor Pressure N/A
SG/Density N/A
Partition Coefficient N/A
Viscosity N/A
Vapor Density 0.07 g/l 21 藲C
Saturated Vapor Conc. N/A
Evaporation Rate N/A
Bulk Density N/A
Decomposition Temp. N/A
Solvent Content N/A
Water Content N/A
Surface Tension N/A
Conductivity N/A
Miscellaneous Data N/A
Solubility N/A
10 - Stability and Reactivity
STABILITY
Materials to Avoid: Oxidizing agents.
HAZARDOUS DECOMPOSITION PRODUCTS
Hazardous Decomposition Products: None.
11 - Toxicological Information
RTECS NUMBER: MW8900000
SIGNS AND SYMPTOMS OF EXPOSURE
To the best of our knowledge, the chemical, physical, and
toxicological properties have not been thoroughly investigated.
ROUTE OF EXPOSURE
Skin Contact: Can cause severe frostbite. May cause skin
irritation.
Skin Absorption: May be harmful if absorbed through the skin.
Eye Contact: May cause eye irritation.
Inhalation: May be harmful if inhaled. Material may be
irritating to mucous membranes and upper respiratory tract. Can
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cause rapid suffocation.
Ingestion: May be harmful if swallowed.
CONDITIONS AGGRAVATED BY EXPOSURE
At high concentrations hydrogen functions as a simple asphyxiant
by displacing air. Symptoms of exposure may include headache,
fatigue, increased breathing rate, dizziness, muscular
incoordination, nausea, vomiting and loss of consciousness.
12 - Ecological Information
No data available.
13 - Disposal Considerations
SUBSTANCE DISPOSAL
Contact a licensed professional waste disposal service to dispose
of this material. Observe all federal, state, and local
environmental regulations.
CONTAMINATED CONTAINER DISPOSAL
Caution: no-return cylinder. Do not reuse. Empty cylinder will
contain hazardous residue. Follow proper disposal techniques.
14 - Transport Information
RID/ADR
UN#: 1049
Class: 2
Proper Shipping Name: Hydrogen, compressed
IMDG
UN#: 1049
Class: 2.1
Proper Shipping Name: Hydrogen, compressed
Marine Pollutant: No
Severe Marine Pollutant: No
IATA
UN#: 1049
Class: 2.1
Proper Shipping Name: Hydrogen, compressed
Inhalation Packing Group I: No
15 - Regulatory Information
CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES
ANNEX I INDEX NUMBER: 001-001-00-9
INDICATION OF DANGER: F+
Extremely Flammable.
R-PHRASES: 12
Extremely flammable.
S-PHRASES: 9 16 33
Keep container in a well-ventilated place. Keep away from
sources of ignition - no smoking. Take precautionary measures
against static discharges.
COUNTRY SPECIFIC INFORMATION
Germany
WGK: No hazard to waters.
SWITZERLAND
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SWISS POISON CLASS: FREI
16 - Other Information
WARRANTY
The above information is believed to be correct but does not
purport to be all inclusive and shall be used only as a guide. The
information in this document is based on the present state of our
knowledge and is applicable to the product with regard to
appropriate safety precautions. It does not represent any
guarantee of the properties of the product. Sigma-Aldrich Inc.,
shall not be held liable for any damage resulting from handling or
from contact with the above product. See reverse side of invoice
or packing slip for additional terms and conditions of sale.
Copyright 2005 Sigma-Aldrich Co. License granted to make unlimited
paper copies for internal use only.
DISCLAIMER
For R&D use only. Not for drug, household or other uses.
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