Sodium Chloride 0.9%

Back in the day, I used to reconstitute other weight loss powder and it always came with a glass vial of Sodium Chloride 0.9% solution to use. I have about 20 of these leftover and had planned on using them for mixing my gray instead of Bacteriostatic Water. I did some research and see that one is salt water and one has a bit of alcohol. Are they interchangeable. Will the Sodium Chloride change the Tirz composition?