Is the package water-tight? I plan to pour 70% alcohol into a package to make sanitizing wipes.

It appears to be, but it doesn’t close once opened. I have really enjoyed these wipes, but I use a dispenser for baby wipes and would do the same thing if I were going to make sanitizing wipes.

Is there a full ingredient(s) list?

Ingredients are 100% pure cotton. Nothing else. They are dry cloths that you can moisten with water, alcohol, or your own mix of essential oils or soap. I use them for isopropyl alcohol to sterilize surfaces or my hands to prevent covid-19, and use them with baby oil to remove makeup, and to apply body wash or lotion. They are very soft, slightly thicker than facial tissues, but not as thick as a t-shirt material. They are very sturdy and don’t rip apart when wet.