Storing your peptides

Three words: cold, dry, and dark. Keep your peptides refrigerated or frozen, sealed away from moisture, and out of direct light. Every way a peptide can break down speeds up the moment any one of those three is compromised — so proper storage is the single biggest factor in how long your peptides last and how reproducible your results are.

Our peptide products are supplied as ready-to-use liquid solutions. They are not permanently stable, so keep each vial refrigerated, sealed, and protected from light. Follow the storage window and handling instructions on the applicable batch documentation.

Our peptides are shipped as ready-to-use liquid solutions. Protect the shipment from heat during transit, and transfer each vial to refrigerated storage as soon as possible after delivery. Inspect the container and solution before handling, and follow the batch documentation for compound-specific storage limits.

Keep liquid peptide solutions refrigerated at 2–8 °C unless the batch documentation says otherwise. Storage life depends on the compound, concentration, container, sterility, and handling history, so follow the applicable batch guidance rather than relying on a single timeline. Keep the vial sealed and protected from light.

The liquid solution is supplied ready for research handling; no mixing or preparation is required. Use an appropriate aseptic technique, inspect the vial for clarity and particulates, and follow your approved research protocol and batch documentation. Do not add water or another solvent unless your protocol specifically requires it.

Allow a chilled vial to reach a suitable handling temperature in a clean, controlled area before opening it. Do not shake it vigorously. Inspect the solution and container for unexpected cloudiness, particulates, leaks, or damage, and follow the batch documentation before beginning your research.

Bacteriostatic water is sterile water containing a small amount of benzyl alcohol, typically 0.9%, to inhibit bacterial growth. It is a separate ready-to-use laboratory solution. Our peptide products are supplied as liquid solutions, so do not add bacteriostatic water to a peptide vial unless an approved research protocol specifically calls for it.

There is no single timeline for every liquid peptide. Usable life depends on the specific compound, concentration, sterility, storage conditions, and handling history. Keep an opened vial refrigerated at 2–8 °C, protected from light, and free of repeated freeze-thaw cycles; consult the batch documentation and published literature, and discard any solution that turns cloudy or shows particulates.

A Certificate of Analysis (COA) is the single most important document in the research peptide supply chain — it turns an unverified liquid solution into a scientifically documented reagent. Because our compounds are For Research Use Only (RUO) and are not regulated like pharmaceuticals, the responsibility for verification sits with you, the researcher, and the COA is your primary quality-assurance tool. A legitimate COA answers four core questions:

• Identity — Is this the correct peptide sequence? Confirmed by Mass Spectrometry (MS).
• Purity — Is it chemically clean? Measured by HPLC.
• Content — How much actual peptide is in the vial? Reported as Net Peptide Content.
• Contaminants — Are any harmful compounds present? Checked with heavy metals and endotoxin testing.

Credible suppliers use independent, third-party laboratories to produce their COAs. Third-party testing removes any conflict of interest, so you get unbiased, empirical data rather than marketing claims.

One practical note: most third-party providers (such as Janoshik) group identity, purity, and content into a single test result, while contaminant testing is usually done separately — typically one test for endotoxins and one for heavy metals.

Transparency is the entire premise of Honest Science, and a third-party Certificate of Analysis is how we back it up. COAs are maintained for tested batches — documenting identity, purity, and content — and are available where applicable, so you are never asked to take an unverified liquid solution on faith. (See the COA questions above for what the document proves and why independent testing matters.)

Purity is the percentage of the material in the vial that is the target peptide, as opposed to truncated sequences, deletion variants, or leftover synthesis reagents. A purity of ≥99% means that, by area, at least 99% of the sample is the intended compound. It is measured by High-Performance Liquid Chromatography (HPLC), which separates the sample into its components so each can be quantified, while Mass Spectrometry (MS) confirms the molecule's identity by its mass. Purity and identity together are what let a result be trusted and reproduced.

A single peptide is one compound — it has one molecular formula, one molecular weight, and one amino-acid sequence, all listed on its product page. A blend combines two or more peptides in a single vial. Because a blend has no single formula, each blend's product page lists every compound it contains with its own individual molecular profile — formula, weight, and sequence — so nothing is hidden behind a marketing name. Blends are supplied as combined liquid solutions for research handling.

Because everything we sell is For Research Use Only (RUO) and not for human consumption. Listing a dose or a health benefit would imply a therapeutic use these compounds are not approved or sold for. Instead, we publish the data that is actually verifiable and useful for research — purity, identity, molecular details, and a third-party COA — and leave experimental design to the qualified researcher.