18+ · Research use only
Bacteriostatic water in the Philippines: the missing reagent.
Every lyophilized peptide needs it, and pharmacy stock varies. What bacteriostatic water is, why plain sterile water is not a substitute, and where to actually get it locally.
What to ask a pharmacy for
Pharmacy stock of bacteriostatic water varies by branch, and it is not a common counter item. If you ask at a pharmacy, ask for bacteriostatic water for injection with 0.9% benzyl alcohol, and read the label before you pay: single-use ampoules of sterile water for injection are a different product, with no preservative. Primara Labs keeps 3ml bacteriostatic water vials in Metro Manila stock.
Why the benzyl alcohol matters
The 0.9% benzyl alcohol in bacteriostatic water inhibits microbial growth inside the vial, which is what makes repeated draws from one vial workable over roughly 28 days. Plain sterile water has no preservative: once a needle enters the vial, the clock on contamination starts immediately. It ships with every order here rather than being sold as an extra, alongside syringes, pads and a reconstitution syringe: what ships in the boxlists the full kit. Since lyophilized peptides are reconstituted once and then drawn from many times across a research protocol, the preserved reagent is the one the protocols specify.
The local answer: ₱300, same day
The Primara Labs bacteriostatic water Philippines listing is a 3ml vial at ₱300, or ₱270 with the standing 10% off, shipped from Metro Manila stock alongside any peptide order or on its own. One 3ml vial covers a single reconstitution with a little in hand, since a typical 10mg peptide vial takes 1 to 2 ml. The standing discount applies to it exactly as it does to every compound in the catalogue.
The label-by-label comparison with plain sterile water is in the resource center.
Supplied for laboratory research use only. Nothing on this page is medical advice.
Bacteriostatic water questions
Where can I buy bacteriostatic water in the Philippines?
Pharmacy availability varies by branch, so call ahead and ask for bacteriostatic water for injection with 0.9% benzyl alcohol, and check the label before you buy. Primara Labs stocks 3ml vials at ₱300 and ships them same day across Metro Manila alongside any order.
Does Mercury Drug sell bacteriostatic water?
We have not checked current stock at any Mercury Drug branch, and availability varies. Ask the pharmacist for bacteriostatic water for injection with 0.9% benzyl alcohol and read the label: sterile water for injection is unpreserved and single-use, so it is a different product and not a substitute for multi-draw laboratory work.
What is the difference between sterile water and bacteriostatic water?
Sterile water for injection is unpreserved and intended for single use, since anything that enters the vial can grow. Bacteriostatic water contains 0.9% benzyl alcohol, which inhibits microbial growth and permits repeated draws from one vial over roughly 28 days. Research protocols specify bacteriostatic water for peptide reconstitution for exactly this reason.
How much bacteriostatic water do I need per peptide vial?
Reconstituting a typical 10mg lyophilized peptide vial uses 1 to 2 ml, so a single 3ml vial covers one reconstitution with a little left over. Most research orders include one water vial for each compound vial.
How should bacteriostatic water be stored?
Store at room temperature before first use. After the first draw, refrigerate the vial and discard it after 28 days.