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The symbol within the pictogram shows an “o” with flames on top of it and a line underneath it. The “o” is for oxygen and the flames indicate that hazardous products with this pictogram present a fire or explosion hazard if they are not stored and handled properly.
This pictogram is used for three WHMIS 2015 physical hazard classes:
The three oxidizer hazard classes have different physical states, but all pose fire and/or explosion hazards if appropriate handling and storage precautions are not followed.
The flame over circle pictogram is only used for hazardous products that are oxidizing solids, liquids or gases.
The basic components for a fire are a source of fuel (such as combustible materials), a source of oxygen, and a spark or other source of ignition. With most fires, the source of oxygen is air (air has about 21% oxygen). Oxidizing solids, liquids or gases readily release oxygen or another oxidizing substance (such as bromine, chlorine, or fluorine). Therefore, these products pose a severe fire hazard. Oxidizers do not burn themselves, but oxidizers can:
The WHMIS 2015 signal words and hazard statements for oxidizing gases, liquids and solids are:
|Hazard Class and Category||Signal Word||Hazard Statement|
|Oxidizing gases – Category 1||Danger||May cause or intensify fire; oxidizer|
|Oxidizing liquids – Category 1 |
Oxidizing solids – Category 1
|Danger||May cause fire or explosion; strong oxidizer|
|Oxidizing liquids – Category 2 |
Oxidizing solids - Category 2
|Danger||May intensify fire; oxidizer|
|Oxidizing liquids – Category 3 |
Oxidizing solids - Category 3
|Warning||May intensify fire; oxidizer|
In addition to the specific hazards identified by the flame over circle pictogram, it is important to remember that the product may have other hazards, for example:
ALWAYS check the SDS and label for the product that you are working with to ensure that you know what is being used and all of the hazards and precautions associated with the product. Ask questions if you are not sure.