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GHS Category -- Pressurized Gas
Posted Date:2023/5/26
GHS definition:
Pressurized gas means gas, liquefied gas or frozen liquefied gas loaded into the reservoir at 200 kPa(gauge pressure) or more at 20℃.
Pressurized gas includes compressed gas, liquefied gas, dissolved gas and frozen liquefied gas, etc.
GHS classification criteria:
Pressurized gas standard
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Class
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Standard
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Compressed gas
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A gas that is completely gaseous when compressed at -50℃; Includes all gases with a critical temperature of £-50℃.
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Liquefied gas
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A gas that is partially liquid when compressed at temperatures above -50 ° C. It is further divided into:
(a) High-pressure liquefied gases: gases with critical temperatures between -50 ° C and +65 ° C;
(b) Low pressure liquefied gas: gas whose critical temperature is higher than +65℃.
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Frozen liquefied gas
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A gas that is partially liquid when packaged because of its low temperature.
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Dissolved gas
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A gas dissolved in a liquid solvent in pressurized packaging.
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Example of pressurized gas:
▪ nitrogen
▪ Hydrogen iodide
▪ Dichlorodifluoromethane
▪ dichlorotetrafluoroethane
▪ dichlorofluoromethane
Labelling of pressurized gases under the Uniform Global System and the Model United Nations Regulations:
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Classification
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Label
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GHS hazard specification code
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GHS dangerous species
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GHS hazard category
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The class or category of a model regulation
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GHS
pictograms
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A pictograph of the model regulations
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GHS signal word
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GHS hazard
instructions
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Pressurized gas
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Compressed gas
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2.2
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or
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Warning
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Pressurized gas; May explode in heat
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H280
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Liquefied gas
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Pressurized gas; May explode in heat
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H280
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Frozen liquefied gas
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Built-in frozen gas; Can cause cold burn or damage
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H281
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Dissolved gas
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Pressurized gas; May explode in heat
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H280
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