GHS hazard class · Physical hazards
Chemicals under pressure
Chemicals under pressure are liquids or solids (often pastes or powders) pressurized with a gas in a pressure receptacle, other than an aerosol dispenser.
What it means
The container is pressurized and can burst if it is heated. The contents may also be flammable.
What to do
Protect from sunlight and heat, do not pierce or burn the container, and keep away from ignition sources if the product is also flammable.
This is general guidance for the class. Your product's safety data sheet takes precedence.
Categories and hazard statements
| Code | Category | Statement | Pictogram | Signal word |
|---|---|---|---|---|
| H282 | Category 1 | Extremely flammable chemical under pressure: may explode if heated | GHS02, GHS04 | Danger |
| H283 | Category 2 | Flammable chemical under pressure: may explode if heated | GHS02, GHS04 | Warning |
| H284 | Category 3 | Chemical under pressure: may explode if heated | GHS04 | Warning |
Chemicals with chemicals under pressure hazard codes
Chemicals in our database whose primary classification includes any current Chemicals under pressure code (H282, H283, H284).
No chemicals in our database carry these codes yet.
Chemicals under pressure: frequently asked questions
What is the GHS hazard class "Chemicals under pressure"?
Chemicals under pressure are liquids or solids (often pastes or powders) pressurized with a gas in a pressure receptacle, other than an aerosol dispenser.
Which hazard statements belong to Chemicals under pressure?
The current hazard statements for this class are H282, H283, H284.
Which pictograms and signal words are used for Chemicals under pressure?
Pictograms: GHS02 (Flame), GHS04 (Gas Cylinder). Signal words: Danger or Warning, depending on the category.
What should I do when working with a chemicals under pressure hazard?
Protect from sunlight and heat, do not pierce or burn the container, and keep away from ignition sources if the product is also flammable.
https://pubchem.ncbi.nlm.nih.gov/ghs/ghscode_10.txt (UN GHS Revision 10, retrieved 2026-10-12)