4
0
0
NFPA 704: Health 0 · Fire 4 · Reactivity 0
Blue = health · Red = flammability · Yellow = reactivity.
Hazard identification (GHS)
- Extremely flammable gas (H220) with a very wide flammable range and very low ignition energy.
- Contains gas under pressure; may explode if heated (H280).
- Burns with an almost invisible flame; lighter than air and collects at ceiling level.
First-aid measures
Inhalation: remove to fresh air; give oxygen or artificial respiration if needed; get medical help. Treat any flash burns conventionally and seek medical attention.
Handling & storage
- Eliminate all ignition sources; use explosion-proof, earthed/bonded electrical equipment and ventilation.
- Store cylinders upright, capped, below 52 °C in a well-ventilated area away from oxidisers.
- Leak-test with soap solution only — never a flame; provide high-level ventilation as hydrogen rises.
Physical & chemical properties
Stability & reactivity
Stable. Violently reactive with oxidisers, halogens and oxygen. Hazardous decomposition: none (product is elemental).
Transport information
Hydrogen, compressed — Class 2.1, UN 1049, Label: Flammable gas.
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This is a summary Safety Data Sheet for reference. For the full signed SDS, grades, purity and cylinder options, contact our team.
Frequently asked questions
Reference summary only, compiled by International Industrial Gases Ltd (updated 2026-07-20). Values are for the compressed-gas form. It does not replace the full signed Safety Data Sheet supplied with the product; always follow the SDS provided with your cylinders.