Hand sanitizing foam for PURELL TFX-2720-12 kills 99.99 percent of most common germs that may cause illness. This benzalkonium chloride (BAK) formulation is ideal for environments where a nonalcohol hand sanitizer is required. It is safe, effective and nonirritating. Dye-free, fragrance-free formula is compatible with vinyl, nitrile and latex gloves. Sanitary Sealed refill helps lock out germs. A fresh dispensing valve comes with each refill. Refill snaps in place with audible click.