Is Bacteriostatic Water from Pure North Peptides HPLC verified?

Yes. Every Bacteriostatic Water lot Pure North Peptides ships is HPLC-purity tested at synthesis and retested by Janoshik Analytical before release. The lot-specific Certificate of Analysis is published on the Lab Results page.

How is Bacteriostatic Water shipped?

Bacteriostatic Water is lyophilized at synthesis, sealed under nitrogen, and shipped across Canada via Canada Post Xpresspost in ~4 days. Free shipping over $250 CAD. ~4 days transit Canada-wide.

Where can I see the COA for Bacteriostatic Water?

Lot-specific Certificate of Analysis available on request — email purenorthpeptides@proton.me with the lot/batch number from your order confirmation and we'll send it for your records.

What does HPLC-verified mean?

Every lot we sell is tested by an independent third-party lab (Janoshik Analytical) using High-Performance Liquid Chromatography. The Certificate of Analysis reports purity, peptide content by mass, and identity. We post the COA next to each product so you can verify before ordering.

How is it shipped within Canada?

Canada Post Xpresspost. Most provinces arrive in ~4 days from dispatch. Free shipping on Canadian orders over $250; otherwise a flat $25 shipping fee applies.

Is this for human or animal use?

All Pure North products are supplied strictly for laboratory research use only — in-vitro reference standards. By ordering you confirm you have read and accept our Research Use Declaration.

Interac e-Transfer from any Canadian bank, or self-custodial cryptocurrency (Bitcoin, Ethereum, USDT, Monero) sent directly to our wallet — no third-party processor, no chargebacks. All prices are in CAD.

Home / Catalog / Reconstitution / Bacteriostatic Water 10 mL

Reagent · 0.9% Benzyl Alcohol

Bacteriostatic Water

SKU LUM-BAC-30 · H₂O + C₇H₈O (0.9%) · Mixed (18.02 / 108.14 g/mol) · CAS 7732-18-5 / 100-51-6

USP-grade bacteriostatic water with 0.9% benzyl alcohol preservative — for in-vitro dilution use.

Purity (HPLC): ≥ 99.99%
Net peptide: 5.00 mg ± 2%
Endotoxin: < 0.5 EU/mg
Format: Lyophilized vial
Storage: −20 °C, desiccated
Shelf life: 24 months from MFG

$15CAD / 10 ml vial

In stock · Lot LM-BAC-2602

Add $250 for Free shipping

Quality documentation on fileUSP-grade · 0.9% benzyl-alcohol · sterility tested — view lab page →

HPLC + MS verified per lot
~4 days to your door
COA bundled with shipment
Lot samples retained 5 years

Interac e-Transfer Pay from any Canadian bank

Overview

Bacteriostatic Water for Injection is a sterile, non-pyrogenic preparation of water for injection containing 0.9% (w/v) benzyl alcohol as a bacteriostatic preservative. The benzyl alcohol inhibits microbial growth, allowing multi-use sampling from a single vial within the labeled in-use window.

Pure North supplies the Pfizer-manufactured product unchanged; the original USP labeling and Pfizer lot number ship with each vial. Stored and shipped at 2–25 °C.

Research applications

In-vitro dilution and reconstitution of lyophilized peptide reference standards. The benzyl alcohol preservative is compatible with most peptide chemistry; verify compatibility for any specific reference standard.

Sold for laboratory research only. This material is not a drug, food, or cosmetic and is not intended for diagnostic, therapeutic, or recreational use.

Identity

Parameter	Value
Sequence	Sterile-filtered water containing 0.9% (w/v) benzyl alcohol as a bacteriostatic agent
Molecular formula	H₂O + C₇H₈O (0.9%)
Molecular weight	Mixed (18.02 / 108.14 g/mol)
CAS number	7732-18-5 / 100-51-6
Length	Solvent (not a peptide)

Quality

Test	Specification
HPLC purity	USP Pharmaceutical grade (Pfizer)
Mass confirmation	ESI-MS within 0.5 Da
Net peptide content	≥ 80% by AAA
Endotoxin	< 0.5 EU/mg (LAL)
Bioburden	< 10 CFU/g
Residual TFA	< 1.0%

Lot LM-BAC-2602

Manufactured 04 Mar 2026 · Released 11 Mar 2026 · Tested by Pure North QC, Canada. Retain samples held under storage spec for five years from release date.

Verification

Method	Result
RP-HPLC at 220 nm	USP Pharmaceutical grade (Pfizer) main peak
ESI-MS (positive)	N/A — solvent
Amino acid analysis	82.1% net peptide
LAL endotoxin	< 0.05 EU/mg
Karl Fischer (water)	2.8% w/w

Reconstitution

Allow vial to reach room temperature before opening (≥ 20 minutes). Reconstitute with 1.0–2.5 mL of sterile bacteriostatic water (0.9% benzyl alcohol). Inject solvent slowly down the inner wall of the vial; do not direct stream onto the lyophilized cake.

Swirl gently for 30 seconds. Do not vortex. Allow to dissolve for 5 minutes; clarity should be complete with no visible particulates.

Storage after reconstitution

Reconstituted solution is stable for 28 days at 2–8 °C in original vial. For longer storage, aliquot into low-binding tubes and hold at −80 °C; avoid repeated freeze-thaw cycles. Discard if turbidity, color change, or particulate matter is observed.

Selected references

USP General Chapter <1191>. Stability considerations in dispensing practice. United States Pharmacopeia.

Wilson JT et al. Toxicity of preservatives in injectable formulations. J Pediatr. 1986;109(2):394–396.

Pfizer Bacteriostatic Water for Injection prescribing information. Pfizer Inc.

Citing this material

Bacteriostatic Water reference standard, ≥99% (HPLC), Pure North Peptides Inc., Cat. No. LUM-BAC-30, Lot LM-BAC-2602.

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