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Hydrogen FAQs

What is the substance identification of hydrogen? plus minus
  • Chemical formula: H₂
  • Synonyms: Liquid Hydrogen (LHY), Gaseous Hydrogen (BHY)
  • REACH Registration Number: Listed in Annex IV / V REACH, exempted from registration
  • Gases under pressure - Compressed gas. H280:Contains gas under pressure; may explode if heated
  • UN/ID No.: UN1049
  • Proper shipping name: HYDROGEN, COMPRESSED Class or Division : 2
  • Tunnel Code: (B/D) Label(s) : 2.1
  • ADR/RID Hazard ID no.: 23
  • Marine Pollutant: No
Why is hydrogen an efficient fuel for transportation such as fuel cell vehicles? plus minus

Hydrogen has the highest combustion energy per pound relative to any other fuel, meaning it is more efficient on a weight basis than fuels used currently. Hydrogen offers 2-3 times more energy than most other common fuels. It combines readily with oxygen, releasing considerable energy as heat.

Unlike carbon-based fuels, hydrogen produces no harmful by-products upon combustion. Only energy and clean water are produced when hydrogen is combined with oxygen in a fuel cell.