Bacteriostatic Water:
Complete Reconstitution Guide

BPC-157 (5mg vial)

TB-500 (5mg vial)

Semaglutide (5mg vial)

CJC-1295/Ipamorelin (5mg)

GHK-Cu (50mg vial)

Unreconstituted Peptide (Lyophilized Powder)

• →Store in refrigerator (2–8°C) for short-term — up to 6–12 months
• →Freeze at –20°C for long-term storage — 12–24 months or longer
• →Keep away from light and moisture — never store in bathroom or near heat sources
• →Do not freeze–thaw repeatedly — repeated temperature cycling degrades peptide bonds

Reconstituted Solution (After Adding Bacteriostatic Water)

• →Refrigerate immediately after reconstitution at 2–8°C
• →Use within 28 days — benzyl alcohol maintains sterility across this window
• →Never freeze reconstituted peptide — freezing can damage the dissolved structure
• →Label with reconstitution date — discard after 28 days regardless of remaining volume

Bacteriostatic Water Vial (Before and During Use)

• →Store at room temperature before opening — refrigeration after opening is preferred
• →Multi-dose safe: the 10ml vial can be drawn from repeatedly across weeks
• →Wipe septum with alcohol before every draw — including from the water vial itself
• →Discard if solution becomes cloudy or particulate matter is visible

Can I use the same bacteriostatic water vial for multiple peptides?

Yes — the 10ml vial can be used to reconstitute multiple peptide vials sequentially. Always wipe the bacteriostatic water septum with a fresh alcohol swab before each draw. The benzyl alcohol maintains the water's sterility across multiple draws. A single 10ml vial is typically sufficient for 3–5 peptide vials depending on reconstitution volumes used.

What happens if I accidentally shake the peptide vial?

Vigorous shaking can disrupt the peptide's three-dimensional structure through mechanical agitation — particularly for larger, more complex peptides like GHK-Cu. If you accidentally shook a vial, inspect the solution: if it is clear without visible particles or cloudiness, the peptide is likely intact. Discard if cloudy. For future reconstitutions, tilt the vial and inject water down the inside wall, then swirl gently.

Does adding more bacteriostatic water make the peptide weaker?

Adding more water lowers the concentration per ml but does not degrade the peptide. The total amount of peptide in the vial is unchanged — you simply draw a larger volume to get the same dose. More water means you draw more units per injection. Less water means you draw fewer units. Neither changes potency; only the volume per dose changes.

Is there any peptide that should NOT use bacteriostatic water?

Bacteriostatic water is appropriate for essentially all lyophilized research peptides. The only consideration is that benzyl alcohol can be irritating in very large volumes — but at the standard 1–2ml reconstitution volumes used with insulin syringes, this is not a practical concern. Some researchers prefer sodium chloride 0.9% for certain compounds, but bacteriostatic water remains the standard for multi-dose protocols.