The biggest difference between compressed air and Refrigerated Liquefied Air is the oxidizing property of the later, IMDG Code lists both as :

UN 1002 AIR, COMPRESSED               Class 2.2

UN 1003 AIR, REFRIGERATED LIQUID Class 2.2 with subsidiary risk 5.1 (oxidizing agent)

Compressed air locomotive
Compressed air locomotive (Photo credit: Wikipedia)

 Observation for UN 1003 in the IMDG Code states “Liquefied, non-flammable gas.Strong oxidizing agent.Mixtures of liquid air with combustible materials or oils may explode. May ignite organic materials”.

By shashi kallada

25 years in Merchant Shipping, Last 13 years working on Packaged Dangerous Goods Sailor, Ex Manager Global Dangerous Goods Maersk Line * Freelance Photographer *Amateur Cyclist

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