Butyllithium gas cylinders are special containers for storing butyllithium, which is an organollithium compound and a very important strong base reagent in organic synthesis. It usually exists in solution form, butyl lithium is sensitive to air and water, so the seal of the cylinder must be very tight to prevent outside air and water from entering the bottle. Generally, high quality sealing materials and sealing structures are used. The design of the bottle valve ensures that the leakage of gas or liquid is completely prevented in the closed state, and that it remains stable and reliable during opening and closing operation.