Specifications carbon monoxide gas 99.9%~99.99% purity CO gas seamless steel CO gas cylinders package;packed according to demand. Product Description properties: At standard temperature and pressure, carbon monoxide gas is a colourless, odourless, without excitant gas.It's purity cover a range of 99.9%~99.99% . applications: Carbon monoxide is a major component of syngas and all kinds of gas, Is of great importance in organic chemical raw materials, Is the basis of C1 chemistry, It can be made a series of products. Carbon monoxide in the metallurgical industry can be used as a reducing agent.