Oxygen (O2) is a colourless and odourless gas. Oxygen, is present in the air with concentration around 21%. Oxygen is at atmospheric conditions always present in gas phase with no odour , colour or taste. It is a highly reactive substance, reacting with almost all elements, except inert gases. Multi-Industry Uses for Oxygen - Oxygen is used with fuel gases in gas welding, gas cutting, oxygen scarfing, flame cleaning, flame hardening, and flame straightening. Metals Manufacturing. Chemicals, Pharmaceuticals and Petroleum. Glass and Ceramics. Pulp and Paper Manufacturing . Ankur Speciality Gases provide Oxygen Gas with purity 99.0% to 99.999% for your medical & industrials usages.