High Purity Hydrogen Cylinder

Before using High Purity Hydrogen Cylinder in any new process or experiment, a thorough material
compatibility and safety study should be carried out. Ensure adequate ventilation.
Ensure all national and local regulations are observed. Ensure equipment is adequately
earthed. Whilst proper care has been taken in the preparation of this document, no
liability for injury or damage resulting from its use can be accepted. Note: When the
Product Name appears in the SDS header the decimal sign and its position comply
with rules for the structure and drafting of international standards, and is a comma
on the line. As an example 2,000 is two (to three decimal places) and not two
thousand, whilst 1.000 is one thousand and not one (to three decimal places).

National Regulations For High Purity Hydrogen Cylinder

Dangerous Substances and Explosive Atmospheres Regulations (DSEAR 2002 No. 2776). Management of Health and Safety at
Work Regulations (1999 No. 3242). The Regulatory Reform (Fire Safety) Order 2005 (2005 No. 1541). Control of Substances
Hazardous to Health Regulations (COSHH, 2002 No. 2677). Provision and Use of Work Equipment Regulations (PUWER, 1998
No. 2306). Personal Protective Equipment Regulations (1992 No. 2966). Control of Major Accident Hazards Regulations
(COMAH, 2015 No. 483). Pressure Systems Safety Regulations (PSSR, 2000 No. 128). Only products that comply with the food
regulations (EC) No. 1333/2008 and (EU) No. 231/2012 and are labelled as such may be used as food additives. This Safety
Data Sheet has been produced to comply with Regulation (EU) 2015/830.

Hydrogen: Specifications

High Purity Hydrogen

Hydrogen finds widespread usage in the electronics industry, gas chromotography, and within clean energy (it is commonly used alongside hydrogen fuel cells to create clean power).

Benefits

• Odourless, colourless and tasteless
• Will ignite easily, so cylinders must not be snifted (this valve outlet clearing procedure is no longer recommended)
• Burns with an invisible flame
• Lighter than air, so will collect at ceiling level
• Produces a flame of approximately 2,834°C when used with Oxygen

Product identifier

Product name: Hydrogen, compressed
Trade name: Hydrogen High Purity, Hydrogen CP Grade N5.0, Hydrogen Research Grade
N5.5, Hydrogen Zero Grade N4.5
Additional identification
Chemical name: Hydrogen
Chemical formula: H2
INDEX No. 001-001-00-9
CAS-No. 1333-74-0
EC No. 215-605-7
REACH Registration No. Listed in Annex IV/V of Regulation (EC) No 1907/2006 (REACH),
exempted from registration.

Melting Point: -259.2 °C
Boiling Point: -253 °C
Sublimation Point: Not applicable.
Critical Temp. (°C): -240.0 °C
Flash Point: Not applicable to gases and gas mixtures.
Evaporation Rate: Not applicable to gases and gas mixtures.
Flammability (solid, gas): Flammable Gas
Flammability Limit – Upper (%): 77 %(V)
Flammability Limit – Lower (%): 4 %(V)
Vapor pressure: No reliable data available.
Relative vapor density: 0.069
Relative density: 0.07
Solubility(ies)
Solubility in Water: 1.62 mg/l
Partition coefficient (n-octanol/water): Not known.
Autoignition Temperature: 560 °C
Decomposition Temperature: Not known.
Viscosity
Kinematic viscosity: No data available.
Dynamic viscosity: No data available.
Explosive properties: Not applicable.
Oxidizing properties: Not applicable.

High Purity Hydrogen Cylinder General information:

Do not discharge into any place where its accumulation could be dangerous.
Consult supplier for specific recommendations. Do not discharge into areas where
there is a risk of forming an explosive mixture with air. Waste gas should be flared
through a suitable burner with a flash-back arrestor.