Bacteriostatic Water - Front - MiPeptidos
Supplies

Bacteriostatic Water

CAS: 7732-18-5 (water); contains 0.9% benzyl alcohol (CAS 100-51-6) as preservative

Bacteriostatic Water is a research peptide in the supplies category. Bacteriostatic water is sterile water for injection containing 0.9% benzyl alcohol as a bacteriostatic preservative. MiPeptidos offers Bacteriostatic Water in 2 sizes with 99.4% verified purity and full analytical documentation.

Starting at
$4.95/vial
In Stock
Ships same day
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USP Grade Purity
COA Included
Third-Party Tested
Same-Day Shipping
CoA Included
HPLC Verified
GMP Compliant
Third-Party Tested
Same-Day Shipping
Batch Tracked

How Bacteriostatic Water Works

Bacteriostatic water is sterile water for injection containing 0.9% benzyl alcohol as a bacteriostatic preservative. The benzyl alcohol inhibits bacterial growth, allowing the vial to be used for multiple reconstitutions over an extended period. It is used as a diluent for reconstituting lyophilized peptides and medications. The benzyl alcohol disrupts bacterial cell membrane integrity and interferes with microbial metabolic processes, preventing contamination of multi-use vials.

Research Applications

1
Peptide reconstitution and dilution
2
Multi-dose vial preparation
3
Injectable formulation compounding
4
Sterile technique and laboratory use
5
Pharmaceutical compounding
View Published Research on PubMed →

Pricing

SizePer Vial10-Pack
3ml
$4.95$34.95
10mlBest Value
$6.95$49.95

Prices shown per vial from 10-pack. Volume discounts available for 50+ vials — contact us.

HPLC Purity Analysis

High-Performance Liquid Chromatography
99.4%purity
mAURetention Time (min)0250500750100005101520253099.4%
Method: RP-HPLC C18 ColumnDetection: UV 220nmMobile Phase: Acetonitrile/Water + 0.1% TFA

Certificate of Analysis

MiPeptidos
Bacteriostatic Water
PASSES ALL SPECIFICATIONS
Batch NumberHR-BCTR-2600315
Date of AnalysisJanuary 12, 2026
Purity (HPLC)99.4%
AppearanceClear, colorless sterile solution
SolubilityN/A — ready-to-use solution
Molecular Weight (MS)18.02 Da (water) — Confirmed
Endotoxin (LAL)<0.1 EU/mg
Sterility (USP <71>)Passes USP <71>

This COA is a representative sample. A batch-specific Certificate of Analysis with full HPLC chromatograms and mass spectrometry data is included with every MiPeptidos order.

Reconstitution Calculator

Add this much bacteriostatic water:
3.0 mL
3 ml Bacteriostatic Water + 3.0 mL BAC water = 1 ml/mL

Inject bacteriostatic water slowly along the vial wall. Gently swirl until dissolved — never shake. Store reconstituted solution at 2-8°C and use within 30 days.

Download Product Brochure

Get our detailed Bacteriostatic Water product brochure with specifications, research applications, HPLC analysis data, and reconstitution guide. Available in English and Spanish.

Customer Reviews

5.0/5from 1 review
Verified
Kevin Nguyen·Los Angeles, CA

MiPeptidos bacteriostatic water is sterile, properly preserved with 0.9% benzyl alcohol, and passes our endotoxin screening every time. Having a reliable BAC water source from the same supplier simplifies procurement for...

Feb 11, 2026
View All Reviews →

Frequently Asked Questions

Bacteriostatic Water (CAS: 7732-18-5 (water); contains 0.9% benzyl alcohol (CAS 100-51-6) as preservative) is a research compound, with a molecular weight of 18.02 Da (water) in the Supplies category. Bacteriostatic water is sterile water for injection containing 0.9% benzyl alcohol as a bacteriostatic preservative. The benzyl alcohol inhibits bacterial growth, allowing the vial to be used for multiple reconstitutions over an extended period. Researchers commonly investigate Bacteriostatic Water for Peptide reconstitution and dilution, Multi-dose vial preparation, Injectable formulation compounding. Every vial from MiPeptidos includes batch-specific analytical documentation.
Bacteriostatic water is a ready-to-use sterile solution — no reconstitution needed. Simply draw the desired volume directly from the vial using a sterile syringe. Store at room temperature (15-25°C) and do not freeze, as this can cause the benzyl alcohol preservative to separate. Each vial can be used for multiple withdrawals over 28 days thanks to the 0.9% benzyl alcohol preservative. MiPeptidos offers 3mL vials for individual use and 10mL vials for labs reconstituting multiple peptides.
Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, while sterile water for injection contains no preservative. This critical difference means BAC water can be used for multiple withdrawals over up to 28 days — the benzyl alcohol inhibits bacterial growth after the vial septum is punctured. Sterile water must be used immediately and any remainder discarded. For multi-dose peptide vials, bacteriostatic water is essential. MiPeptidos offers 3mL and 10mL sizes.
Store bacteriostatic water at room temperature (15-25°C) — do NOT freeze it, as this can cause the benzyl alcohol preservative to separate from solution. Unlike lyophilized peptides that need -20°C storage, BAC water is a stable solution at ambient temperature. Once the vial is punctured, the 0.9% benzyl alcohol preservative keeps it sterile for up to 28 days of multi-dose use. Protect from direct sunlight and extreme heat. MiPeptidos ships BAC water at ambient temperature since cold-chain is not required.
Every Bacteriostatic Water vial from MiPeptidos is USP-grade and comes with documentation confirming sterility testing (passes USP <71>), endotoxin levels (<0.1 EU/mg), and benzyl alcohol concentration verification at 0.9%. Our current batch (HR-BCTR-2600315) was tested on January 12, 2026. The solution is confirmed clear, colorless, and particulate-free. MiPeptidos also provides bulk pricing on BAC water orders — email info@mipeptidos.com for quantities of 50+ vials.

Specifications

Purity
USP Grade
Form
Sterile Solution
CAS Number
7732-18-5 (water); contains 0.9% benzyl alcohol (CAS 100-51-6) as preservative
Mol. Weight
18.02 Da (water)
Formula
H2O (with 0.9% C7H8O benzyl alcohol)
Half-Life
N/A (diluent, not a therapeutic agent)
Storage
Store at room temperature (15–25°C). Do not freeze.
Sizes
3ml, 10ml

Sequence

N/A (not a peptide; sterile diluent)

Research Use Only. This product is intended for laboratory research purposes only. Not for human consumption. Handle with appropriate safety precautions.

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