Bacteriostatic Water Australia: Buy Bac Water for Peptides Online

Shop the Best Bac Water for Peptides in Three Vial Sizes

Add a vial to the cart with your peptides, since no lyophilised powder goes into solution without a diluent and a series stalls before it starts. Pick the size below by how much your bench will use within 28 days.

What Is Bacteriostatic Water?

Put simply, bacteriostatic water is purified, sterilised water carrying a small dose of benzyl alcohol, so microbes that reach the liquid cannot multiply. It is the liquid labs use to turn a freeze-dried peptide cake back into a solution, and it is built for vials that will be opened again and again.

How the benzyl alcohol works

Benzyl alcohol is the simplest aromatic alcohol: a benzene ring carrying a CH2OH group. It mixes into water up to roughly 4 per cent, so the 0.9 per cent used here is fully dissolved and invisible. Its antimicrobial action comes mainly from slipping into the lipid membranes of bacteria and fungi and making them leaky, which halts growth and division. At 0.9 per cent that effect is enough to hold organisms in check between draws, while staying gentle on short peptide chains.

That last point has limits, and they are where the question of the best bacteriostatic water for peptides gets more interesting than brand or price. Formulation scientists at the University of Colorado showed in the mid-2000s that 0.9 per cent benzyl alcohol made a freeze-dried recombinant protein, the interleukin 1 receptor antagonist, aggregate more on reconstitution than plain water did. The alcohol binds weakly to exposed hydrophobic patches, loosens the folded structure and lets partly unfolded molecules clump together. Short linear peptides such as BPC-157 or Selank have no folded core to disturb. Larger folded chains are a different matter.

How it differs from water that looks the same

• Deionised or ultrapure lab water: chemically clean, but not sterile and not tested for bacterial endotoxin unless certified as such
• Single-use sterile water: same purity, no preservative, so one draw only
• Bacteriostatic saline: the same preservative in 0.9 per cent sodium chloride, which changes the ionic strength of the solution

So what is the best bacteriostatic water for peptides? Any sterile, correctly labelled 0.9 per cent product will do the job for short peptides, and the differences that matter are a sound stopper, a printed expiry and a volume your bench will finish in time. Our firmer advice concerns the exceptions. For long or folded chains, run a small test vial first and look for haze or a drop in recovered concentration before committing a whole lot to preserved water. And trust your nose: benzyl alcohol slowly oxidises to benzaldehyde, which smells of bitter almonds, so an old vial with that scent should be replaced. The full guide comparing bac water with sterile water covers shelf life and when to switch diluents.

Buy Bacteriostatic Water Online as a Multi-Draw Peptide Diluent

Bacteriostatic water is sterile water preserved with 0.9% benzyl alcohol. At that strength the alcohol does not kill bacteria. It stops any organism carried in on a needle from multiplying, though it cannot rescue a solution that is already contaminated, so clean technique still matters at every draw.

Order it for that preservative. A peptide vial reconstituted with preserved water can be drawn from over several weeks in the fridge, while unpreserved water suits a single draw. It dissolves almost every water-soluble peptide we sell, from short tripeptides to long metabolic chains, and it sits with syringes and acid diluent in our lab supplies range. Buying GHK Cu peptide bac water for a copper peptide vial is the same purchase, as the blue tripeptide dissolves readily in it.

Where to Buy Bacteriostatic Water in Australia, and What Is in Each Vial

Every size is a clear glass vial with a grey flip-off cap over a rubber stopper, filled with a colourless liquid that should look exactly like plain water. The 3 mL, 10 mL and 30 mL fills differ only in volume, and the three "+ 1 syringe" options add a single sterile U-100 1 mL syringe to the same vial, not a different formula. The only ingredient besides water is benzyl alcohol at 0.9%, the same preservative strength used in pharmaceutical bacteriostatic water for injection, where overseas labels typically carry a prescription-only statement and a warning against use in neonates.

How is bacteriostatic water normally obtained in Australia? Not, as a rule, over a retail pharmacy counter. Australian pharmacies mainly supply Water for Injections, a preservative-free product entered on the Australian Register of Therapeutic Goods and packed in single-use ampoules, which is the wrong tool for a vial that will be drawn from for weeks. Benzyl alcohol itself does not appear in the Poisons Standard as a scheduled substance as of October 2026, which we confirmed in the October 2026 instrument, so the preserved diluent sits outside the scheduling system. Our guide on whether Australian chemists stock bac water looks at the retail side in more detail.

That gap is why most labs buy bacteriostatic water online from the same research supplier as their peptides. AminoBlend holds all three sizes in Australian stock as a laboratory diluent for reconstituting research peptides, sold to adults 18 and over and not for human or veterinary use. Bacteriostatic water for sale here is matched to our vial fills, and labs dissolving acid-loving compounds can add a 3 mL vial of 0.6% acetic acid instead.

Order the Best Bacteriostatic Water for Peptides by Volume

All three vials hold the same formula, so the right choice is simply the volume your lab will finish within 28 days of the first puncture. Per millilitre, the 3 mL vial costs $3.00, the 10 mL vial $1.40 and the 30 mL vial $0.80.

• 3 mL, $9 covers one or two peptide vials at 1 to 2 mL each, suited to a single-compound project or a lab that opens fresh diluent for each new peptide.
• 10 mL, $14 handles four or five reconstitutions at 2 mL, the size most benches choose when two or three compounds run side by side.
• 30 mL, $24 serves labs mixing peptides most weeks, and it pays off only if the volume is used before the 28-day mark.

Shop any size with one sterile U-100 1 mL 29G syringe for $3 more, the same as the single syringe price. Taking several vials from one lot wherever stock allows keeps a single diluent lot number across a whole study. Sale is limited to buyers aged 18 and over.

Shop Sterile, Traceable Bacteriostatic Water With Lot Records

As a supply rather than a peptide, the water is not sent for mass spectrometry or HPLC. What counts is that it is sterile, carries the stated 0.9% benzyl alcohol and can be traced. A stopper and flip-off cap seal each vial, and the printed lot and expiry let you record which diluent went into each reconstitution beside the peptide lot.

The peptides are the analysed items, each with identity by mass spectrometry, purity by HPLC and one certificate per lot, and our guide to reading a certificate of analysis explains those reports. Before mixing, check that the water is clear with no particles and that the cap is intact. Discard any cloudy vial or one with a damaged stopper.

Buy the Best Bac Water for Peptides Near You and Store It Well

Pharmacies tend to stock single-use sterile water rather than preserved multi-draw vials, which makes AminoBlend the best place to buy bac water for peptides in the same cart as the peptides themselves. We are an online store shipping Australia-wide from local stock, with same-day dispatch for orders paid before 3pm on business days, and transit times are on the delivery information page.

As a worked example, 2 mL added to a 10 mg peptide vial gives 5 mg per mL, so one 10 mL vial covers five such reconstitutions. The reconstitution guide walks through the technique, which is to swab the stopper, let the water run slowly down the glass, then swirl rather than shake.

Keep sealed vials at 15 to 25 °C out of direct light and never freeze them, since ice can crack the glass or loosen the seal. After the first puncture, date the label, refrigerate at 2 to 8 °C and discard after 28 days. Reconstituted peptide that will be drawn over many sessions is best divided into aliquots.

Other Names for Bacteriostatic Water

Labs shorten it to bac water, BAC water or BW, and catalogues also list it as preserved sterile water or benzyl alcohol water. Chemical suppliers give the preservative its own synonyms, phenylmethanol and phenylcarbinol, and both simply mean benzyl alcohol.

Two neighbouring products are easy to mix up with it. Bacteriostatic sodium chloride uses the same preservative in a 0.9% saline base, and plain sterile water contains no preservative at all. Whatever the label says, the defining figures here are sterile water, 0.9% benzyl alcohol and a stoppered multi-draw vial.

Order Bacteriostatic Water or Sterile Water for the Right Job

Sterile water has no preservative and should be used straight after its seal is broken, so it suits one reconstitution consumed the same day. Bacteriostatic water is the right purchase whenever a peptide vial will be drawn more than once, and the bacteriostatic water vs sterile water guide compares the two in detail.

Two cases call for something else. Cell cultures sensitive to benzyl alcohol usually take a preservative-free sterile buffer, and the few peptides that resist neutral pH dissolve better in acetic acid 0.6%, with IGF-1 LR3 the main example. To measure water into a vial, our U-100 insulin syringes read straight against calculator units.