Hydrogen N5.5 – Safety and Identification
Safe Use Guidelines
Before using Hydrogen N5.5 in any new process or experiment, conduct a thorough material compatibility and safety study. In addition, ensure adequate air ventilation and comply with all national and local regulations. Moreover, equipment must be properly earthed to prevent hazards.
Whilst proper care has been taken in preparing 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 follows international standards (e.g., 2,000 means two to three decimal places, not two thousand).
National Regulations for Hydrogen N5.5
Hydrogen N5.5 use is governed by several UK and EU regulations, including:
- Dangerous Substances and Explosive Atmospheres Regulations (DSEAR 2002 No. 2776)
- Management of Health and Safety at Work Regulations (1999 No. 3242)
- 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)
Furthermore, only products that comply with food regulations (EC No. 1333/2008 and EU No. 231/2012) and are labelled accordingly may be used as food additives.
Transport Precautions
- Avoid transporting cylinders in vehicles where the load space is not separated from the driver’s compartment.
- Ensure the driver is aware of potential hazards and emergency procedures.
- Secure product containers firmly before transport.
- Close container valves and check for leaks.
- Keep valve guards or caps in place.
- Maintain adequate ventilation during transport.
Product Identifier
- Product Name: Hydrogen, compressed
- Trade Names: Hydrogen High Purity, Hydrogen CP Grade N5.0, Hydrogen Research Grade N5.5, Hydrogen Zero Grade N4.5
- Chemical Name: Hydrogen
- 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
- Purity: 100% (classification only; consult documentation for supplied purity)





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