What is the difference between bacteriostatic water and sterile water?

Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, which inhibits bacterial growth and allows multi-dose use for up to 28 days. Sterile water contains no preservative and must be used immediately after opening.

How much bacteriostatic water should be used to reconstitute a peptide?

The volume depends on the desired concentration for your research protocol. Common reconstitution volumes are 1mL or 2mL per vial. Always refer to your specific research protocol for the recommended volume.

How can I verify the quality of bacteriostatic water before use?

Inspect the solution before each use. It should be completely clear and colorless. Do not use if you observe cloudiness, discoloration, particulate matter, or damage to the vial seal. Discard after 28 days regardless of appearance.

-33%

4X Tested - ISO 17025

Sterile View COA

Research Supply

BAC Water

Q: How should bacteriostatic water be stored?

Unopened bacteriostatic water should be stored at controlled room temperature (15–30°C / 59–86°F) away from direct light. Refrigeration is not required for the water itself. Once used to reconstitute a peptide, the solution should be refrigerated at 2–8°C.

Q: Is bacteriostatic water compatible with all research peptides?

Bacteriostatic water is compatible with the majority of research peptides. In rare cases where a compound is sensitive to benzyl alcohol, the product documentation will specify an alternative reconstitution solvent.

Certificate of Analysis

Bacteriostatic water is a sterile, non-pyrogenic water containing 0.9% benzyl alcohol as a preservative, used as a diluent for reconstituting lyophilized peptides in research settings.

Size

Clear

BUNDLE & SAVE

1 Bottle $9.99 MOST POPULAR

2 Bottles $19.28

3+ Bottles $28.47

2-Day Shipping

Free Shipping
over $200

Free shipment
protection

Secure Checkout
256-bit SSL

Description

What is BAC Water?

Bacteriostatic water is a sterile, non-pyrogenic preparation of water for injection containing 0.9% benzyl alcohol as a bacteriostatic preservative. It is the standard diluent used in research laboratories for reconstituting lyophilized (freeze-dried) peptides.

Unlike sterile water, which must be used immediately and discarded after a single use, bacteriostatic water’s benzyl alcohol preservative inhibits bacterial growth, allowing multi-dose access for up to 28 days after the first puncture. This makes it the preferred reconstitution solvent for research peptides that require repeated sampling.

Bacteriostatic water is compatible with the vast majority of research peptides. In rare cases where a compound is sensitive to benzyl alcohol, product documentation will specify an alternative solvent.

Research Applications

Areas of Investigation

Reconstitution

Peptide Reconstitution

Used as the standard diluent for reconstituting lyophilized peptides, maintaining solution integrity for multi-dose research use.

Preservation

Solution Stability

The 0.9% benzyl alcohol preservative inhibits microbial growth, allowing safe repeated access for up to 28 days.

Lab Use

Laboratory Preparation

Compatible with the majority of research peptides and commonly used alongside insulin syringes for precise volumetric measurement.

Compound Profile

Technical specifications

What is BAC Water?

Molecular Profile

Sequence

N/A, Not a peptide

Molecular Formula

H₂O + C₇H₈O (0.9% benzyl alcohol)

Molecular Weight

18.015 g/mol (water)

Appearance

Clear, colorless liquid

Form

Sterile solution

Handling & Shelf Life Guidelines

Storage & Stability

Storage (Pre-Reconstitution)

Store at controlled room temperature (15–30°C / 59–86°F) away from direct light. Refrigeration is not required.

Storage (Post-Reconstitution)

Once opened, use within 28 days. Discard if cloudiness, discoloration, or particulate matter is observed.

Shelf Life

24 months from date of manufacture when stored as directed

Sensitivity Notes

Keep sealed and away from direct light. Do not freeze.

Compliance & Clinical Overview

Regulatory & Research Status

FDA Status

USP-grade bacteriostatic water is a recognized pharmaceutical preparation. Not a drug product.

WADA Classification

N/A, Not a performance-enhancing substance.

Clinical Trial Status

Widely used as a standard reconstitution solvent in pharmaceutical and research settings for decades.

Published Studies

Widely used as a standard reconstitution solvent in pharmaceutical and research settings for decades.

Research Disclaimer

For laboratory and research purposes only.

COA's (Certificate of Analysis)

Third Party Tested by Freedom Diagnostics

Sterile

Purity

Variant

Bac Water

Lot #

GL-2609-043

Labelled

3mL

Actual

N/A

Tested

9/18/2026

View COA

(opens in a new tab)

Sterile

Purity

Variant

Bac Water

Lot #

GL-2609-004

Labelled

30mL

Actual

N/A

Tested

9/18/2026

View COA

(opens in a new tab)

Sterile

Purity

Variant

Bac Water

Lot #

BAC10-GL01

Labelled

10mL

Actual

N/A

Tested

6/28/2027

View COA

(opens in a new tab)

Frequently Asked Questions

Common questions about BAC Water research

BAC Water

Out of stock?

Description

Research Applications

Peptide Reconstitution

Solution Stability

Laboratory Preparation

Compound Profile

Molecular Profile

Storage & Stability

Regulatory & Research Status

COA's (Certificate of Analysis)

Frequently Asked Questions

Your Cart (0)

Age & Research Use Verification