Learn what a catalogue peptides resource includes, how to compare purity and documentation, and how to handle research peptides safely in the lab.
A catalogue peptides listing is an organized inventory of peptides that a manufacturer or vendor offers for laboratory research. A typical peptide catalog includes each compound's sequence, purity, CAS number, molecular weight, and storage instructions so scientists can compare options quickly. These catalogs are generally intended for research use only, not for human consumption.
What You'll Find in a Peptide Catalog
A reliable catalog peptides resource goes beyond a simple product list. It usually provides the documentation a lab needs to verify identity and quality before ordering. The exact fields vary by vendor, but most catalogs follow a similar structure.
- Peptide name, sequence, and molecular formula
- CAS number and molecular weight
- Purity level (often expressed as HPLC percentage)
- Form (lyophilized powder or liquid)
- Storage conditions and shelf life
- Certificate of analysis (COA) availability
- Recommended reconstitution solvent
The term is sometimes spelled catalog peptides in the United States, and the two spellings refer to the same thing. For example, bachem catalog peptides from large-scale manufacturing runs can be useful when you need consistent batches for repeated experiments.
How to Compare Catalog Peptides
Not all catalogues are equally useful. The best ones make it easy to filter by purity, quantity, and documentation. When you compare entries, focus on the specifications that affect your experiment.
| Specification | Why It Matters | What to Look For |
|---|---|---|
| Purity (HPLC) | Impurities can alter experimental results | ≥95% for general research; ≥98% for sensitive assays |
| Sequence confirmation | Ensures you received the correct peptide | Mass spectrometry data in the COA |
| Form | Affects handling and stability | Lyophilized powder is more stable for long-term storage |
| Storage | Prevents degradation | Follow vendor instructions, often -20°C or lower |
| Documentation | Supports reproducibility | Third-party COA and MSDS |
Catalogue Peptides vs. Custom Peptide Synthesis
Catalog peptides are off-the-shelf items, while custom synthesis is made to order. Each approach has trade-offs depending on your timeline, budget, and sequence requirements.
| Feature | Catalog Peptides | Custom Synthesis |
|---|---|---|
| Lead time | Usually ships in days | Often 2–6 weeks |
| Cost | Lower per unit | Higher due to setup |
| Sequence options | Limited to listed items | Any sequence up to length limits |
| Purity options | Standard grades | Can be tailored |
| Documentation | Standard COA | Custom COA and additional QC available |
| Best for | Common research peptides | Novel or modified sequences |
Reconstitution Supplies: Bac Water for Peptides
Once you have a catalog peptide in hand, you may need to reconstitute it. Researchers often use bac water for peptides because it contains 0.9% benzyl alcohol, which helps inhibit bacterial growth in multi-dose vials. A 10 ml vial is a common size that many labs keep on hand.
There is often confusion about reconstitution solution vs bacteriostatic water for peptides. Bacteriostatic water contains a preservative, while plain reconstitution solution (sterile water or saline) does not. If you plan to use a vial multiple times, bacteriostatic water is usually preferred. Many researchers ask where to buy bacteriostatic water for peptides, and it is available from lab suppliers, compounding pharmacies, and some online marketplaces.
Choose a product that includes a clear expiration date and proper documentation. Always store bacteriostatic water according to the manufacturer's instructions. If you are unsure which solvent to use, consult your lab's protocol or a qualified professional.
Safety and Legal Considerations for Peptide Research
Most catalog peptides are sold for research use only. They are not FDA-approved for human use, and they should not be used as drugs, supplements, or treatments without oversight from a licensed healthcare professional. Some peptides are regulated differently depending on the country and the specific compound.
If you are working with peptides in a lab, follow institutional biosafety guidelines and proper handling procedures. Always consult a healthcare professional for any questions about human use. Reputable vendors provide clear labels and documentation that reinforce research-only status.
Important: Catalogue peptides are not consumer products. They are laboratory reagents, and human use without medical supervision can be unsafe and illegal.
Frequently Asked Questions
What is a peptide catalogue used for?
A peptide catalogue is used by researchers to compare and order peptides for laboratory experiments. It lists specifications like purity, sequence, and storage conditions. Catalogues are not intended as shopping guides for human use.
Are catalogue peptides FDA-approved?
No, most catalogue peptides are sold for research use only and are not FDA-approved for human use. Some peptides may be approved as prescription drugs in specific formulations, but the catalog versions are not. Always consult a healthcare professional before using any peptide.
What is the difference between bacteriostatic water and reconstitution solution for peptides?
Bacteriostatic water contains 0.9% benzyl alcohol to inhibit bacterial growth, while reconstitution solution is typically sterile water or saline without a preservative. Bacteriostatic water is preferred for multi-dose vials. Reconstitution solution is used when a preservative-free solvent is required.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.