Sodium chloride injection is a kind of liquid commonly used in infusion, which is 0.9% sodium chloride aqueous solution. We also call it physiological saline. Used for water loss caused by various reasons, including hypotonic, isotonic and hypertonic water loss. Hypertonic nonketotic diabetic coma can be corrected by using isotonic or hypotonic sodium chloride. Low chlorine metabolic alkalosis; External use of normal saline to wash eyes and wounds. It is also used to induce labor by water bag in obstetrics.

I suggest you find a drug recycling office to recycle, and don't use it blindly.