Non-Flammable Colourless Liquid Argon can be boiled at a temperature range of -186 Degree C. Liquid Argon is Non-flammable and heavier than air. Liquid Argon is a kind of refrigerated liquid gas that is colourless and odourless in nature. Non-Flammable Colourless Liquid Argon constitutes 0.93% of atmospheric air and remains inert at most temperatures and pressures.