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A black gas cylinder icon in a red-bordered diamond, the GHS symbol for gases under pressure.
Also known as: Gas under pressure pictogram, GHS04
One of nine official GHS pictograms, warning that a container holds compressed, liquefied, dissolved, or refrigerated liquefied gas under pressure.
Warns that the contents are a gas under pressure — compressed, liquefied, dissolved, or refrigerated liquefied — which may explode if heated or cause cold burns.
Appears on the outer packaging of a supplied chemical and again in section 2 of its safety data sheet, so a reader who has the sheet can check the label against it. On a product sold in the European Union or Great Britain it is not decoration: the supplier is required to show the pictogram the classification calls for.
European Union and Great Britain · Contexts: Packaging, Laboratory
Covers compressed, liquefied, refrigerated liquefied and dissolved gases. One pictogram can stand for several distinct hazard classes, which is why the pictogram alone never tells you the whole story — the hazard statements printed beside it do.
Contexts: Packaging, Laboratory
Is a *supply* label. A drum or tank in transit carries a differently shaped and coloured label for the same hazard under the transport rules, and the two schemes coexist — a package can lawfully carry both at once.
Contexts: Packaging
Warns about the container rather than the substance in it. A cylinder of an entirely harmless gas carries this pictogram, because a cylinder that is dropped or heated is dangerous whatever is inside; a refrigerated liquefied gas adds a cold-burn hazard on top. It is one of two pictograms the European orange-square scheme had no equivalent for, so a reader comparing an old label with a new one will find nothing to match it against.
European Union · New with the GHS; no pre-2015 European counterpart · Contexts: Packaging, Laboratory
A black silhouette of a gas cylinder (a cylindrical tank with a valve on top), inside a diamond outlined in red.