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GHS Category -- Flammable Gases (including chemically unstable gases)
Posted Date:2022/8/3 1
GHS Definition:
▪Flammable gas refers to the gas that has a flammable range with air at 20 ℃ and a standard pressure of 101.3 kPa.
▪ Chemically unstable gas refers to a flammable gas that can have an explosive reaction even in the absence of air or oxygen.
GHS standard:
Flammable Gas Standards
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Category
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Standard
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1
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At 20 °C and 101.3 kPa standard pressure, gas:
(a) is ignitable when the mixture is 13% or less by volume in air; or
(b) Regardless of the lower flammability limit, with air, the flammable range is at least 12 percent.
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|
2
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Gases other than Class 1 gases that have a flammable range when mixed with air at 20°C and a standard pressure of 101.3 kPa.
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NOTE: Aerosols are not classified as flammable gases.
Examples of flammable gases:
▪ Carbon dioxide and ethylene oxide mixture
▪Fluoromethane
▪Fluoroethane
▪Vinyl fluoride
▪Cyclopropane
▪Cyclobutane
▪Ethylene oxide
▪Monosilane
Flammable gas label and classification:
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Classification
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Label
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Hazard statement code
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|
Hazard category
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Hazard classification
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Pictograms
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Signal word
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Hazard statement
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GHS
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United Nations Model Regulations
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Flammable gases (including chemically unstable gases)
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1
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|
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Danger
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Extremely flammable gas
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H220
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2
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No pictogram
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None
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Warn
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Flammable gas
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H221
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A
(chemically unstable gas)
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No additional pictograms
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None
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None
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Additional Hazard Statements:
Explosive reaction possible even in the absence of air
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H230
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|
B
(chemically unstable gas)
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No additional pictograms
|
None
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Additional Hazard Statements:
Under high pressure and/or high temperature, explosive reaction may occur even in the absence of air
|
H231
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