Research Peptide Supplies

Conducting peptide research requires more than just the peptide compounds themselves. A well-equipped laboratory needs access to appropriate solvents, storage materials, and handling equipment to ensure that experimental conditions are controlled and reproducible. WG Peptides provides essential ancillary supplies alongside our research peptide range, offering UK researchers a convenient single-source solution.

Bacteriostatic Water for Peptide Reconstitution

Bacteriostatic water (BAC water) is the standard reconstitution solvent for the majority of lyophilised research peptides. It consists of sterile water for injection containing 0.9% benzyl alcohol, which acts as a bacteriostatic preservative to inhibit microbial growth in the solution.

The benzyl alcohol preservative allows reconstituted peptide solutions to be used over multiple sessions without rapid bacterial contamination — a significant advantage over plain sterile water, which should ideally be used within 24 hours of opening. BAC water-reconstituted solutions typically remain suitable for use for up to 28 days when stored at 2–8°C.

WG Peptides supplies pharmaceutical-grade bacteriostatic water in sealed vials. View our bacteriostatic water product page for specifications and ordering information.

Reconstitution Equipment and Technique

Proper reconstitution technique is critical to preserving peptide integrity. The basic equipment required for peptide reconstitution includes:

• Sterile syringes — for measuring and transferring precise volumes of reconstitution solvent. Insulin syringes (1 mL) are commonly used for the small volumes involved in peptide reconstitution.
• Alcohol swabs — for sterilising vial stoppers before needle insertion to maintain aseptic conditions.
• Sterile vials — for storing aliquoted reconstituted solutions. Glass vials with rubber stoppers and aluminium crimp seals provide the best protection.
• Pipettes and tips — for laboratories requiring more precise volumetric measurements than syringes can provide.

When reconstituting a peptide, add the solvent slowly to the side of the vial, allowing it to flow gently over the lyophilised powder. Do not inject directly onto the powder or shake vigorously, as this can cause foaming, denaturation, or loss of material. Allow the powder to dissolve naturally — most peptides will dissolve completely within a few minutes. If necessary, gentle swirling can help. Avoid vortexing.

Use our reconstitution calculator to determine the correct volume of solvent for your desired concentration.

Storage Solutions for Research Peptides

Proper storage infrastructure is essential for maintaining peptide stability over time. Key storage considerations include:

Temperature control: Lyophilised peptides require storage at -20°C or below. A dedicated laboratory freezer with temperature monitoring and alarm systems is recommended. Frost-free freezers should be avoided as the cyclic temperature changes during defrost cycles can compromise peptide stability.

Desiccation: Moisture is a primary degradation pathway for lyophilised peptides. Peptide vials should be stored with desiccant pouches in sealed containers. When removing peptides from cold storage, allow the container to equilibrate to room temperature before opening to prevent condensation from forming on the cold powder.

Light protection: Some peptides, particularly those containing tryptophan, tyrosine, or phenylalanine residues, are sensitive to photodegradation. Store these compounds in amber vials or wrapped in aluminium foil.

For complete storage guidance, see our Peptide Storage and Handling Guide.

Laboratory Documentation and Record Keeping

Rigorous documentation is a cornerstone of good laboratory practice. For peptide research, important records include:

• Certificates of analysis (COA) for each peptide batch, documenting purity, identity, and test results
• Reconstitution logs recording the date, solvent used, volume added, and resulting concentration
• Storage temperature records for freezers and refrigerators containing peptide stocks
• Aliquot tracking to monitor freeze-thaw cycles and remaining inventory
• Experimental usage records linking specific peptide batches to experimental data

WG Peptides provides certificates of analysis with every product, giving researchers the documentation they need to maintain full traceability from receipt through to experimental use.

Ordering Research Supplies

WG Peptides offers competitive pricing on research peptides and accessories, with additional savings available through our bulk purchasing programme. All orders are shipped via tracked, insured UK delivery services with temperature-appropriate packaging.

Browse our complete product catalogue or read more about our research peptide range.