What color is a hydrogen cylinder?

Hydrogen cylinders are light green in color.

 

The purpose of hydrogen cylinders is to store hydrogen gas. Hydrogen gas at room temperature and pressure is a colorless, odorless, highly flammable, and sparingly soluble gas in water. It is the least dense gas known in the world and can be used as a filling gas for airships and hydrogen balloons. According to the "Gas Cylinder Color Marking" standard, gas cylinders must be painted different colors to distinguish them from the gas medium they contain; hydrogen cylinders are light green.

 

According to the national standard "Gas Cylinder Color Marking" implemented since 2016, hydrogen cylinders should be painted light green to differentiate them from other gas cylinders. Hydrogen cylinders should be handled with care during transport; they should not be dropped, rolled, or subjected to impacts or strong vibrations. Storage and use areas for hydrogen cylinders should be well-ventilated and kept away from fire sources, heat sources, and direct sunlight.