
Accessories / Reconstitution
Bacteriostatic Water (BAC Water)
3mlBuy BAC water from UK stock, sent the same day you order. Sterile water with 0.9% benzyl alcohol, for reconstituting freeze-dried research peptides.
Vial size
Quantity
Handling
Bacteriostatic Water storage
- Storage
- Room temperatureAway from light
- Once opened
- Multi-use vial. Discard 28 days after first puncture.
- Shipping
- Tracked 24Royal Mail, dispatched the same day

The range
One vial, or the set.
Every vial in the range is lyophilised, labelled and lot-numbered the same way, with the certificate for its lot linked from its own product page. Pictured: BPC-157, TB-500, GHK-Cu, Glow and Retatrutide.
Browse the rangeBacteriostatic Water UK: common questions
- What's the bacteriostatic water price?
- BAC water 3ml is £1.99 and 10ml is £3.99. The 10ml is cheaper per ml, at £0.40. For cheap BAC water in bulk, packs of 10, 30 or 50 vials cost less per vial: fifty 10ml vials work out at £2.79 each.
- Is BAC water the same as bacteriostatic water?
- Yes. BAC water is the short name, and Bacteriostatic Water for Injection is its name in the US Pharmacopeia. All three mean sterile water with a preservative, usually benzyl alcohol. It isn't plain sterile water, which has no preservative, or bacteriostatic saline, which also contains salt.
- How fast is delivery?
- Same day, from Manchester, whenever you order. Royal Mail Tracked 24 aims for next working day delivery. Free over £40, otherwise £3.99.
- Which size should I buy, 3ml or 10ml?
- Go by how much you add to each peptide vial. At 1ml each, a 3ml vial covers up to three and a 10ml up to ten. An opened vial is discarded after 28 days, so pick the size you'll use up in that time.
- How should I store bacteriostatic water?
- At room temperature, away from light. It doesn't need a fridge. It's a multi-use vial: discard it 28 days after first puncture, or sooner if it turns cloudy.
- Can I buy bacteriostatic water in the UK?
- Yes, as a laboratory reagent for reconstituting research peptides. It isn't a controlled drug, and this vial isn't a licensed medicine, so it's sold for research use only, not for human use. You must be 18 or over.
About Bacteriostatic Water
Bacteriostatic water is sterile water with a preservative, usually benzyl alcohol (ours has 0.9%). The preservative holds back bacterial growth, so one vial can be drawn from more than once. It's a common solvent for freeze-dried research peptides. We sell it in 3ml and 10ml vials, singly or in packs of 10, 30 or 50, for laboratory research only.
Research areas
- Peptide reconstitution
- Stock solution preparation
- Diluting peptide stocks
- Peptide solubility testing
Further reading on Bacteriostatic Water
Every batch independently tested by an accredited independent laboratory before dispatch. The signed certificate for your lot is supplied against your order ID.
Legal notice
This product is sold strictly for in-vitro laboratory research purposes only. It is not approved for human or veterinary use, is not a drug, food, or cosmetic, and should not be misused as such. UK Peptides accepts no liability for misuse. By purchasing you confirm you are a qualified researcher aged 18 or over.
Bacteriostatic Water 3ml
£1.99


