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USP-Grade Bacteriostatic Water for Peptides

Bacteriostatic Water for Injection, USP — sterile water preserved with 0.9% benzyl alcohol, in 30 mL multi-dose vials, produced in an FDA-registered facility in the United States and shipped from the USA. Supplied for research use only.

  • Bacteriostatic Water for Injection, USP

  • FDA-registered U.S. facility

  • 30 mL multi-dose · 0.9% benzyl alcohol

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Bacteriostatic Water product
ResearcherResearcherResearcher

Advanced BAC Water for Medical Research

Quality-Controlled
Research Supply

0.9% Benzyl Alcohol
Preservative System

Professional Medical
Research Workflows

Bacteriostatic water vials in a laboratory setting

USP-Grade Bacteriostatic Water from an FDA-Registered U.S. Facility

What Medibact stocks is Bacteriostatic Water for Injection, USP — sterile water preserved with 0.9% benzyl alcohol, filled into 30 mL multi-dose vials. The benzyl alcohol is the preservative that makes a vial re-enterable rather than single-use, which is why bacteriostatic water rather than plain sterile water is the standard diluent for reconstituting a vial that will be drawn from more than once.

The Specification, Stated So It Can Be Checked

Provenance claims are only useful if they are specific enough to verify. Here is exactly what is in the vial and where it came from:

  • Bacteriostatic Water for Injection, USP (Sterile Water for Injection, USP with 0.9% benzyl alcohol)
  • 30 mL multi-dose vial — the standard research-supply format
  • Produced in an FDA-registered facility in the United States
  • Shipped from the USA, in Standard and TM listings of the same underlying specification
  • Supplied for research use only
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Benefits of Bacteriostatic Water in Medical Research

30 mL research supply vial

Designed for controlled handling in professional research settings.

30mL

30 mL research supply vial

Efficient use across multiple applications

Consistent research workflows

Supports dependable liquid preparation for professional medical research workflows.

Consistent research workflows

Maintains consistency across research workflows

0.9% Benzyl Alcohol formulation

Helps inhibit bacterial growth and supports controlled laboratory handling.

0.9%

0.9% Benzyl Alcohol formulation

Reduced contamination risk during handling

Researcher handling bacteriostatic water

Storage and In-Use Handling, in Specifics

Bacteriostatic water is stored at controlled room temperature, away from light — refrigeration is not required and it should not be frozen. Because the vial is preserved and multi-dose, the practical limit is not the shelf life of an unopened vial but how long it stays in use after the stopper is first pierced.

How USP-Grade Documentation Actually Works

Brand-name USP product is released against a monograph rather than shipped with a per-batch third-party certificate. The practical points that follow from that:

  • Product labeling for multi-dose bacteriostatic water commonly specifies discarding the vial 28 days after first puncture
  • USP-grade product is released against the USP monograph — the label claim plus the lot number are the documentation trail
  • That differs from the per-batch third-party COAs common in the grey research-chemical market
  • Store away from light at controlled room temperature; do not freeze
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Peptide Guide Library

Structured educational guides designed to help researchers review peptide terminology, study context, and reconstitution math concepts in one place.

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Bacteriostatic Water & Reconstitution Guides

Educational articles covering bacteriostatic water, sourcing considerations, and reconstitution math for research settings.

ResearcherResearcherResearcher

Advanced BAC Water for Medical Research

Quality-Controlled
Research Supply

0.9% Benzyl Alcohol
Preservative System

Professional Medical
Research Workflows

Frequently Asked Questions (FAQs)

Please visit our FAQ page before reaching out to our customer support. Our team regularly updates this resource to provide you with the most up-to-date and comprehensive information, saving you valuable time.

The specification is stated plainly so it can be checked. Medibact supplies Bacteriostatic Water for Injection, USP — sterile water preserved with 0.9% benzyl alcohol — in 30 mL multi-dose vials, produced in an FDA-registered facility in the United States and shipped from the USA, for research use only. Two listings are offered, Standard and TM; both are the same underlying USP specification rather than two different formulations. Medibact also publishes a free library of educational peptide guides and free reconstitution and dosage calculators, which is unusual for a supplier of a single consumable.
By understanding how USP-grade product is documented, which is different from how grey-market research chemicals are documented. Bacteriostatic Water for Injection, USP is released against the USP monograph, and the documentation trail is the label claim plus the lot number on the vial — not a per-batch third-party certificate of analysis. That is the standard system for a compendial pharmaceutical-grade product made in an FDA-registered facility. If a reseller offers a lab COA for brand-name bacteriostatic water, treat it as an extra document rather than the primary assurance, and check that the lot number on the certificate matches the lot on the vial in your hand.
At controlled room temperature, away from direct light. Refrigeration is not required for bacteriostatic water, and it should not be frozen. Because the vial is preserved and multi-dose, the limit that matters in practice is not the shelf life of an unopened vial but how long it remains in use after the stopper is first pierced: product labeling for multi-dose bacteriostatic water commonly specifies discarding the vial 28 days after first puncture. Wipe the stopper with alcohol before each entry — the benzyl alcohol inhibits bacterial growth but does not replace aseptic technique.
In research settings it is the standard diluent for reconstituting lyophilized (freeze-dried) peptides — the powder in a research vial has to be dissolved before any amount can be measured or drawn. The reason bacteriostatic water is used rather than plain sterile water is the 0.9% benzyl alcohol preservative, which inhibits bacterial growth and is what makes a vial re-enterable over a period of days rather than single-use. Medibact supplies it for research use only.
One ingredient, with a large practical consequence. Sterile Water for Injection, USP contains no preservative, so a vial is intended for a single use and discarded after one entry. Bacteriostatic water is that same sterile water with 0.9% benzyl alcohol added as a bacteriostatic preservative, which inhibits the growth of bacteria introduced during handling and is what allows a multi-dose vial to be entered repeatedly — commonly with labeling that specifies discarding it 28 days after first puncture. If a reconstituted vial will be drawn from more than once, the preserved version is the one that supports that.
There is no single correct volume — the amount of diluent sets the concentration, and the arithmetic is fixed: concentration in mg per mL equals the vial's milligram content divided by the millilitres of bacteriostatic water added. A 10 mg vial gives 10 mg/mL with 1 mL, 5 mg/mL with 2 mL and 2 mg/mL with 5 mL. More diluent does not change how much peptide is in a given amount; it spreads that amount across more syringe graduations, which makes small amounts easier to measure accurately. Medibact publishes free reconstitution and dosage calculators that run this computation for any vial size and volume. This is concentration math for research use, not dosing guidance.
No. Medibact sells bacteriostatic water and digital educational guides, and does not sell peptides of any kind. The peptide guide library and the reconstitution and dosage calculators are educational reference material covering mechanism, published evidence, reported research figures and reconstitution arithmetic — they are not product listings, and nothing on the site is offered for use in humans or animals.