Gas cylinder (GHS04)
The GHS pictogram for gases under pressure: compressed, liquefied, refrigerated liquefied and dissolved gases.
How to read it
It is GHS04. Canada’s WHMIS lists it for those four kinds of gas under pressure and for chemicals under pressure. Chemicals under pressure in categories 1 and 2 carry the Flame (GHS02) as well, both in Canada and on US labels, where OSHA’s standard shows the gas cylinder and flame together for them. In Great Britain it is called Gas under pressure.
Also searched as: compressed gas symbol, GHS04.
These identify the hazard class a pictogram represents. For handling, storage and first aid, refer to the product's label and safety data sheet.
Read next
- Next in Hazard symbolsCorrosion (GHS05)The GHS pictogram for corrosives: chemicals that are corrosive to metals, or that can cause skin corrosion or serious eye damage.
- In NFPA 704 fire diamondSA (simple asphyxiant gas)On an NFPA 704 fire diamond, SA in the white section at the bottom marks a simple asphyxiant gas: a gas such as nitrogen, argon or helium that is dangerous because it displaces the oxygen in the air.
More hazard symbols
The same shape elsewhere
Browse symbols drawn with diamonds.
Sources
- Allocation of Label Elements (29 CFR 1910.1200, Appendix C), 29 CFR 1910.1200 Appendix C, U.S. Occupational Safety and Health Administration, C.4.16, C.4.18
- WHMIS - Pictograms (OSH Answers), Canadian Centre for Occupational Health and Safety
- Hazard pictograms (symbols), GB CLP, Health and Safety Executive (Great Britain)
- GHS Classification (Rev.11, 2025) Summary, PubChem, U.S. National Library of Medicine
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 25, 2026. How we research
Added .