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Division 2.1 – Flammable gases
A material that is a gas at 20° C or below and 101.3 kPa of pressure (ambient temperature and pressure), i.e. the material has a boiling point of 20° C at sea level and: Is ignitable when in a mixture of 13 percent or less by volume with air. Or has a flammability range with air of at least 12% regardless of the lower limit. Source: ,
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Division 2.2 – Non-toxic, non-flammable gases
Non-Flammable/Non-Poisonous Compressed Gas - A material or mixture that exerts in the packaging an absolute pressure of 280 kPa (40.6 psi) or greater at 20° C and does not meet the definition of Division 2.1 or 2.3. This includes compressed gas, liquefied gas, pressurized cryogenic gas, comporessed gas in solution, asphyxiant gas and oxidizing gas. Source: ,
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Division 2.3 – Poisonous gas
Gas Poisonous by Inhalation - A material that is a gas at 20° C or below and 101.3 kPa of pressure (ambient temperature and pressure), i.e. the material has a boiling point of 20° C at sea level and: Is known to be so toxic to humans as to pose a hazard during transportation Or in the absence of adequate data on human toxicity, is presumed to be toxic to humans because when tested on laboratory animals it has an LC50 value of = 5,000 ml/m3 LC50 is the concentration that will cause death to 50% of a sample population of laboratory animals under specified conditions. Source: ,
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