Is a Certificate of Analysis available for Bacteriostatic Water (0.9% Benzyl Alcohol)?

Yes. Batches are independently verified by reverse-phase HPLC. The Certificate of Analysis is batch-matched to the vial label and published in the public COA library at alphex.co.uk/pages/coa, where you can read it before you order.

How should it be stored on arrival?

Lyophilised peptides ship vacuum-sealed. Refrigerate at 2 to 8 C for short-term storage and freeze at minus 20 C for long-term storage. Keep light-sensitive compounds in the original vial.

What is it supplied for?

Supplied exclusively for laboratory and in-vitro research purposes by qualified researchers. Not authorised for human or veterinary use.

Bacteriostatic Water (0.9% Benzyl Alcohol) research peptide vial

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Solvent

Bacteriostatic Water (0.9% Benzyl Alcohol)

Q: How is it shipped and how quickly?

Order by 2pm Monday to Friday for same-day dispatch from UK domestic stock. Sent with Royal Mail Tracked 24, which aims for the next working day, in vacuum-sealed, discreet packaging. 3.99 GBP under 60 GBP, free over 60 GBP after any discount.

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Independently verified to specification

Pass on all three assays

Benzyl alcohol content, pH and sterility, all within limits

Measured by HPLC-UV/VIS, AOAC 981.12, USP <71> at Vanguard Laboratory on the exact batch we ship you, not a representative sample from a previous lot.

Batch on the vial#0010-BAC

Certificate lot0010

Vial size certified10 mL

LaboratoryVanguard Laboratory, Olympia WA

Laboratory IDV251215-25 002

Date reported6 January 2026

Chromatographic purity by HPLC, full chromatogram on the certificate

Batch number on the certificate matches the number on your vial

Published in full before you buy, 1 certificate on record for this compound

Read this batch's certificate

Vanguard Laboratory is accredited to ISO/IEC 17025:2017 by A2LA under certificate scope 6377.01. The chromatographic purity result shown is not represented as an accredited-scope test. The laboratory did not observe sample selection and cannot confirm the sample is representative of the whole lot.

Certificate of Analysis

Every batch is independently verified by reverse-phase HPLC to 99+% purity by Vanguard Laboratory. The certificate is batch-matched to the vial label and published in our COA library, so you can read it before you order rather than asking for it.

Vanguard is accredited to ISO/IEC 17025:2017 by A2LA under certificate scope 6377.01. The chromatographic purity result is not represented as an accredited-scope test.

Shipping & delivery

Order by 2pm Mon-Fri for same-day dispatch. Sent with Royal Mail Tracked 24, which aims for the next working day. Vacuum-sealed, discreet packaging. £3.99 under £60, free over £60 after any discount.

Free delivery protection is included on every order. If your parcel is lost in transit or a vial arrives damaged, we replace it at no cost. See shipping and delivery.

Storage & handling

Lyophilised peptides ship vacuum-sealed. Refrigerate (2-8°C) on arrival for short-term storage, freeze (-20°C) for long-term.

Research use only

Supplied exclusively for laboratory and research purposes. Not authorised for human or veterinary use.

BACTERIORSTATIC WATER (containing
0.9% Benzyl Alcohol) - Research Grade

For research purposes only. This product is supplied exclusively for scientific laboratory research and analytical applications. It is not intended for human or animal use, and must not be misused in any way that contravenes regulations or applicable laws.

This product constitutes a sterile, non-pyrogenic preparation of water containing 0.9% (9mg/mL) Benzyl Alcohol added as a bacteriostatic preservative. It is specifically formulated for the reconstitution of lyophilized (freeze-dried) reagents, peptides, and substrates in a controlled laboratory setting.

Technical Specifications:

Composition: Sterile Water with 0.9% Benzyl Alcohol (v/v).
Grade: Laboratory Reagent Grade (HPLC Compatible).
Filtration: 0.22µm sterile filtered to ensure contaminant-free solution.
pH Stability: Buffered for optimal peptide stability upon reconstitution.
Packaging: Type I Borosilicate Glass Vial with crimp seal.

Storage & Handling: Store at 20°C to 25°C (68°F to 77°F). Once the seal is punctured, the vial integrity is maintained by the bacteriostatic agent for up to 28 days. Discard any unused portion after this period to ensure experimental accuracy.

Bacteriostatic Water (0.9% Benzyl Alcohol) specification

Compound class	Laboratory reagent for peptide reconstitution
Sequence	Not applicable (reagent)
Molecular formula	H2O with 0.9% w/v benzyl alcohol
Molecular weight	Not applicable
CAS number	7732-18-5 (water); 100-51-6 (benzyl alcohol)
Also known as	BAC water, bacteriostatic water for reconstitution
Form	Sterile aqueous solution, multi-dose vial
Purity and identity	Sterile, 0.9% benzyl alcohol preservative
Available sizes	10ml
Storage	Store at 15-25 C. Discard 28 days after first puncture.
Documentation	Batch-matched Certificate of Analysis with the HPLC chromatogram, the measured purity and the issuing laboratory named. Published in the public COA library, searchable by the batch code printed on the vial label.
Origin and dispatch	UK domestic stock. Same-day dispatch before 2pm Mon-Fri, sent with Royal Mail Tracked 24.
Intended use	Laboratory and in-vitro research only. Not authorised for human or veterinary use.

Values are typical for the compound. The Certificate of Analysis for the shipped batch is the authoritative record for purity, identity and net content.