Name: Bacteriostatic Water 3mL
Brand: RetaLABS.is
SKU: bacteriostatic-water-3ml

Question 1

When should I choose the 3mL over the 10mL vial?

Accepted Answer

The 3 mL vial is the practical choice for single peptide reconstitutions or short research protocols where the total diluent requirement is small. A single peptide vial typically requires 0.5–2 mL of bacteriostatic water to achieve a working concentration, so a 3 mL vial covers one reconstitution with volume to spare, or two reconstitutions at higher concentrations. If your research protocol involves only one or two peptide vials over the entire study period, the 3 mL vial provides sufficient diluent without the excess of a 10 mL vial that may sit open and unused for weeks. The 3 mL format is also convenient as an auxiliary or backup diluent vial for researchers who primarily use the 10 mL but want a separate dedicated vial for a specific compound. Both vials contain identical formulations; the choice is purely logistical. If there is any chance your protocol will expand, the 10 mL is more versatile.

Question 2

What is bacteriostatic water used for?

Accepted Answer

Bacteriostatic water is the standard diluent for reconstituting lyophilised (freeze-dried) research peptides. When a peptide is supplied as a white lyophilised powder in a sealed vial, it must be dissolved in a suitable aqueous solution before use, and bacteriostatic water provides the optimal conditions for this: sterile, compatible with most peptides, and preserved for multi-use over 28 days. The 0.9% benzyl alcohol preservative inhibits bacterial and fungal growth in the opened vial, enabling multiple withdrawals from the same vial across a research protocol that may span days or weeks. This multi-use property is the defining advantage over sterile water for injection, which must be used immediately once opened. Bacteriostatic water is also isotonic at the benzyl alcohol concentration used, which supports cellular viability in cell culture and in vivo applications. Its broad peptide compatibility, sterility, and multi-use capability make it the first-choice diluent for virtually all lyophilised peptide research applications.

Question 3

How should the 3mL vial be stored?

Accepted Answer

Store bacteriostatic water at room temperature (15–30°C), protected from freezing and direct light. Do not refrigerate or freeze bacteriostatic water (freezing can damage the rubber septum, compromise the vial seal integrity, and potentially cause cracking in glass vials, all of which would compromise sterility). Room temperature storage is appropriate for both unopened and opened vials. Once the septum is first punctured, mark the vial with the date of first use and use within 28 days, maintaining the same room temperature storage conditions throughout. Keep the vial upright and handle with sterile technique. Use a fresh syringe and needle for each withdrawal to avoid introducing contaminants through the septum into the remaining diluent. The 3 mL small format is inherently used up more quickly than the 10 mL, so the 28-day window is rarely a constraint for researchers using a 3 mL vial for one or two reconstitutions.

Question 4

Is 3mL enough to reconstitute a peptide vial?

Accepted Answer

Yes (3 mL of bacteriostatic water is sufficient for the majority of single peptide vial reconstitutions). Standard reconstitution uses 0.5–2 mL per vial depending on the desired concentration and the mass of peptide in the vial. For example, reconstituting a 5 mg vial to 5 mg/mL requires only 1 mL, while reconstituting the same vial to 1 mg/mL requires 5 mL. In the latter case, a 10 mL vial would be more appropriate. For typical research peptide vials in the 2–10 mg range, however, 3 mL is more than adequate when reconstituting to a reasonably concentrated working solution of 1–5 mg/mL. Use the formula: volume = mass ÷ target concentration to verify your specific requirement before choosing the 3 mL or 10 mL format. See the Peptide Reconstitution Guide for detailed concentration and volume tables.

Question 5

Can I use this bacteriostatic water with any of the RetaLABS peptides?

Accepted Answer

Bacteriostatic water is compatible with the majority of RetaLABS peptides and is the recommended diluent for all lyophilised vials unless the specific product guide states otherwise. It is used with BPC-157, TB-500 blend, CJC-1295 + Ipamorelin, KLOW, KPV, MOTS-c, PT-141, Selank, Semax, SS-31, Retatrutide, Tirzepatide, and Semaglutide. For HGH (recombinant somatropin), bacteriostatic water is also compatible at standard concentrations, however, unlike most lyophilised peptides which are stored frozen, HGH requires refrigerated (not frozen) storage of the lyophilised vial, so consult the HGH-specific reconstitution guidance for storage notes before proceeding. For NAD+, sterile water or PBS is preferred over bacteriostatic water for in vitro enzymatic applications where benzyl alcohol could interfere with enzyme activity. For all other peptides in the RetaLABS catalogue, bacteriostatic water is the default and recommended diluent.

Bacteriostatic Water 3mL

Customer Reviews

Frequently Asked Questions