What is BAC water?Bacteriostatic water (BAC water) is sterile water containing 0.9% benzyl alcohol as a preservative. It is used to reconstitute research peptides and prevents bacterial growth in the vial.What does IU mean on the syringe?A U-100 insulin syringe has 100 units per ml. Each scale unit (1 IU) equals 0.01 ml. The calculator shows the marking up to which you need to draw.How long is a reconstituted peptide stable?Reconstituted peptides should be stored at 2–8 °C and used within 21–30 days. For long-term storage, freeze at –20 °C in unreconstituted form.