Physicochemical properties: traits Colorless, odorless, tasteless, non-toxic flammable gas.

Melting point -259.14 ° C

Boiling point -252.8 °C

Relative density 0.0899

Uses: used as raw materials for synthetic ammonia, synthetic methanol, synthetic hydrochloric acid, metallurgical reducing agent, hydrodesulfurizing agent in petroleum refining, etc.