Kisspeptin-10 · Research brief

Kisspeptin-10 for Sale: Vial Formats, COAs, Ordering

Real Peptides Research TeamEditorial

Updated September 9, 20269 min read

41 WORDS

Short answer

Key takeaways

Kisspeptin-10 is a decapeptide with the sequence Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2 and a molecular weight of approximately 1302 Da, supplied as lyophilised powder in sealed glass vials.
A certificate of analysis is only meaningful when its lot number matches the number printed on the vial in your hand.
HPLC purity expressed as area percent and net peptide content are separate measurements, and the counterion plus residual moisture account for part of gross vial mass.
Incomplete C-terminal amidation creates a free-acid impurity roughly 1 Da from the target that can hide inside a headline purity figure on low-resolution instrumentation.
Domestic stock is the single biggest determinant of delivery speed, with dispatch commonly inside 24 hours on business days versus multi-week international transit.
Every listing of kisspeptin-10 for sale in this category is research-use-only material and is not an approved drug product for human or veterinary use.

The purity percentage on a peptide label is the least useful number printed on it. What matters is whether the certificate of analysis attached to that vial carries the same lot number, and whether anyone can produce the chromatogram behind it. That single check separates a credible listing of kisspeptin-10 for sale from an expensive guess in a glass vial.

We supply research-grade peptides to laboratories and independent researchers, and the questions we field about kisspeptin-10 for sale are almost never about the molecule. They're about documentation, fill weight, and what physically arrives in the box.

Where can researchers find kisspeptin-10 for sale, and what should a listing include?

Kisspeptin-10 for sale as a research compound is supplied as a lyophilised (freeze-dried) powder in a sealed glass vial, commonly in 5mg or 10mg formats, accompanied by a batch-specific certificate of analysis showing HPLC purity and mass spectrometry identity confirmation. Before accepting delivery, match the lot number on the COA against the lot number printed on the vial label.

Here's the distinction most listings blur: HPLC purity and net peptide content are two different measurements. A vial can test at 99% purity by area percent and still deliver less peptide by mass than the label implies, because the trifluoroacetate counterion and residual moisture also weigh something. What follows covers how vial formats and fill weights are specified, how to read a COA line by line instead of trusting the headline figure, what genuinely drives pricing, and how domestic ordering and dispatch work.

What actually arrives: vial formats, fill weight and labelling

Kisspeptin-10 is a decapeptide fragment of the KISS1 gene product, also catalogued as metastin 45-54, with the sequence Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2 and a molecular weight of roughly 1302 Da. That terminal NH2 matters more than it looks: the C-terminal amidation is what allows binding at KISS1R (formerly GPR54), the G-protein coupled receptor studied extensively in reproductive neuroendocrinology research.

Supplied form is almost always lyophilised powder in a crimp-sealed amber or clear glass vial under vacuum. Common research formats sit at 5mg and 10mg per vial. Don't panic at the visual. At 5mg, the material frequently presents as a barely visible white film adhering to the vial wall rather than a recognisable pile of powder, because freeze-drying leaves a low-density cake that can collapse during shipping vibration.

A properly labelled vial carries five things: compound name, lot or batch number, nominal quantity in milligrams, storage condition, and an explicit research-use-only statement. If any of those five are missing, the vial is not traceable to a document, and an untraceable vial is unusable for reproducible work.

Storage convention for lyophilised material is -20°C, protected from light and moisture. Our team has seen more material lost to repeated freeze-thaw cycling and humidity ingress through a punctured stopper than to anything that happened in transit.

Reading a certificate of analysis instead of trusting the headline number

A legitimate COA for kisspeptin-10 for sale contains a reverse-phase HPLC chromatogram (typically a C18 column running an acetonitrile/water gradient with TFA as ion-pairing agent), a purity figure expressed as area percent at 214nm or 220nm, and a mass spectrometry trace confirming the observed molecular ion against the theoretical mass. Three elements, not one number in a box.

The check most buyers skip is the image itself. A PDF that states 99.1% purity with no chromatogram attached is a claim, not evidence. The chromatogram shows you where the impurity peaks sit and whether they elute close to the main peak, which is where the interesting failure hides.

That brings up the point most sourcing guides never mention: incomplete C-terminal amidation produces a free-acid impurity differing from the target by roughly 1 Da. On a low-resolution mass spectrometer that impurity can sit underneath the main peak and never appear as a separate signal, while HPLC may only partially resolve it. Two vials both stamped 99% can therefore contain meaningfully different proportions of correctly amidated peptide.

The second overlooked line is net peptide content. Synthetic peptides purified with TFA carry that counterion into the final product, and the salt plus residual water contributes to gross vial mass. Net peptide content, determined by amino acid analysis or nitrogen determination, tells you how much peptide you actually received. Batch documentation for our catalogue is published on the certificates of analysis page so the lot on the vial can be matched before anything gets opened.

What drives price, and how domestic ordering and dispatch work

Cost on kisspeptin-10 for sale tracks synthesis difficulty and testing overhead, not marketing. The amidated C-terminus requires Rink amide resin rather than standard Wang resin, the ten coupling cycles include tryptophan and arginine residues whose side-chain protection makes cleavage and workup messier, and purification to a high-purity threshold sacrifices yield. Small-batch synthesis with exact sequence verification costs more per milligram than bulk runs, which is precisely why the cheapest listings tend to be the ones reusing a two-year-old COA across unrelated lots.

The rest of the price is logistics and documentation. Per-batch third-party analytical testing is a recurring cost per lot, not a one-time expense, and insulated packaging matters during summer transit windows.

Ordering against domestic stock is what compresses the timeline. Orders placed with Real Peptides ship from domestic warehouses with dispatch typically within 24 hours on business days and tracked delivery, which removes the customs hold and the unmonitored transshipment leg that turns an overseas order into a three-week unknown.

One boundary that isn't negotiable: every compound in the catalogue, including kisspeptin-10, is supplied strictly for laboratory research use and is not an FDA-approved drug product for human or veterinary use. Nothing on this page is guidance for administration. Questions about any compound's relevance to a person or an animal belong with a licensed physician or veterinarian, not with a peptide supplier. Researchers extending work into related signalling pathways often review the wider research peptide catalogue for adjacent compounds documented to the same standard.

Kisspeptin-10 for Sale: Supplier Channel Comparison

Not every source of kisspeptin-10 for sale offers the same documentation trail or the same transit exposure. This table compares the four channels researchers realistically encounter and what each one costs you in verification work.

Supplier Channel	Documentation Typically Provided	Dispatch and Transit Exposure	Professional Assessment
Domestic research supplier with published COAs	Batch-specific COA with HPLC chromatogram and MS trace, lot number matched to vial label	Ships from domestic stock, dispatch commonly within 24 hours, tracked and insulated	Highest verification value per dollar; the lot-matching step takes under a minute and eliminates the most common failure mode
Overseas bulk manufacturer	Manufacturer COA, sometimes generic to the product rather than the specific lot	Multi-week transit with customs holds and unmonitored temperature during layovers	Viable for large-volume procurement with independent retesting budgeted; poor fit for single-vial research orders
General marketplace or reseller listing	Frequently a screenshot or reused PDF with no traceable lot number	Unpredictable; repackaging by a third party breaks the chain of custody	Weakest option; you cannot audit what you cannot trace back to a synthesis batch
Analytical reference-standard catalogue	Full analytical dossier, certified reference material grade	Standard commercial freight, cold chain where specified	Excellent documentation but priced for calibration standards, not for routine assay volumes

What If: Sourcing and Receiving Scenarios

The three situations below account for most support tickets we see after an order of kisspeptin-10 for sale arrives.

What if the vial looks empty or the powder is just a film on the glass?

Weigh nothing and open nothing; check the COA fill weight first, then inspect the vial under angled light. Lyophilised peptide at 5mg forms a low-density cake that routinely collapses into a translucent film on the vial wall during shipping vibration, which reads as an empty vial to the naked eye. Appearance is not a potency indicator. If the seal is intact, the crimp cap is undisturbed, and the vacuum is holding, the fill weight on the batch documentation is the number that governs.

What if the COA lot number doesn't match the vial label?

Stop, photograph both, and raise it with the supplier before the vial is opened or reconstituted. A mismatch means the analytical data in front of you describes different material, so every purity and identity claim attached to that vial is unverified. This is the most common documentation failure in the sector and the easiest to catch. Suppliers who publish lot-level records let you resolve it in minutes; suppliers who email a single PDF for all orders cannot resolve it at all.

What if the package sat in a hot delivery vehicle for two days?

Lyophilised peptide is considerably more temperature-tolerant than reconstituted solution, so short ambient excursions during transit are generally survivable for sealed dry powder, but document the exposure and inspect for discolouration or clumping. Moisture ingress is the real risk, because a hydrated cake degrades faster and clumping signals the vacuum seal failed. Material that arrives visibly sticky, brown-tinged, or with a compromised stopper should be flagged to the supplier rather than used, since visual inspection alone cannot confirm the sequence survived intact.

The Unglamorous Truth About 99% Purity Claims

Let's be direct about this: a purity percentage with no chromatogram behind it is a marketing figure, and the peptide market runs on marketing figures. Anyone can type 99.2% into a PDF template. What cannot be faked cheaply is a per-lot analytical run with the trace attached, the retention time visible, and the mass spectrum matching the theoretical molecular ion. When a listing of kisspeptin-10 for sale is materially cheaper than its peers, the saving almost always came out of that per-batch testing line, not out of synthesis efficiency. Judge suppliers on what they publish per lot, not on what they claim per product.

Kisspeptin-10 for sale is one of those research compounds where the sourcing decision has more effect on your data than anything you do afterwards at the bench, because an unverified vial contaminates every downstream result while looking identical to a verified one. The compound is well characterised and the synthesis is well understood. The variability is almost entirely in who made this particular batch, what they measured, and whether they'll show you. Ask for the lot. Match the number. That habit costs sixty seconds and protects months of work.

References

Peer-reviewed sources on Kisspeptin-10 indexed in PubMed, listed for research context. Real Peptides supplies Kisspeptin-10 for laboratory research use only.

Kisspeptin-10 protects against HIV-1 Tat-induced blood-brain barrier dysfunction and neuroinflammation via RhoA/ROCK pathway: Implications for HAND therapy. Neurotoxicology, 2025. PMID 40712838. doi:10.1016/j.neuro.2025.07.008
Adult Neurogenesis Is Regulated by the Endocannabinoid and Kisspeptin Systems. International journal of molecular sciences, 2025. PMID 40362219. doi:10.3390/ijms26093977
Kisspeptin-10 Protects Against TNF-α-Induced Chondrocyte Senescence via the SIRT1/p53/p21 Signaling. Journal of biochemical and molecular toxicology, 2025. PMID 40400312. doi:10.1002/jbt.70298
Effects of kisspeptin on the maturation of human ovarian primordial follicles in vitro. Zygote (Cambridge, England), 2024. PMID 38099429. doi:10.1017/S0967199423000527
Kisspeptin-10 binding to Gpr54 in osteoclasts prevents bone loss by activating Dusp18-mediated dephosphorylation of Src. Nature communications, 2024. PMID 38346942. doi:10.1038/s41467-024-44852-9
Kisspeptin Regulates Cell Invasion and Migration in Endometrial Cancer. Journal of the Endocrine Society, 2024. PMID 38264268. doi:10.1210/jendso/bvae001
Kisspeptin and Endometriosis-Is There a Link?. Journal of clinical medicine, 2024. PMID 39768606. doi:10.3390/jcm13247683
Kisspeptin neuron projections to oxytocin neurons are not necessary for parturition in the mouse. Brain structure & function, 2023. PMID 37389617. doi:10.1007/s00429-023-02670-7

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Questions

It is supplied as a lyophilised (freeze-dried) powder in a sealed glass vial, most commonly in 5mg or 10mg research formats. The vial should carry the compound name, lot number, nominal quantity, storage condition, and a research-use-only statement. Batch-specific certificate of analysis documentation should accompany the lot.

Ask for the batch-specific COA and confirm its lot number matches the label on the vial you receive. A credible COA includes a reverse-phase HPLC chromatogram with purity as area percent at 214nm or 220nm, plus a mass spectrometry trace confirming the observed mass against the theoretical value of roughly 1302 Da. A purity figure with no chromatogram attached is a claim, not evidence.

Research-use-only peptides are sold for laboratory research purposes only and are not approved drug products for human or veterinary use. Suppliers restrict sale accordingly, and buyers are responsible for compliance with institutional and jurisdictional rules governing research chemicals. Questions about relevance to a person or an animal belong with a licensed physician or veterinarian, not with a supplier.

Three factors dominate: synthesis complexity, purification yield, and per-batch analytical testing. The C-terminal amidation requires Rink amide resin rather than standard resin, and the tryptophan and arginine residues complicate cleavage and workup. Third-party testing is a recurring per-lot cost, so unusually cheap listings have usually skipped it or reused older documentation across unrelated batches.

Standard practice for lyophilised research peptides is storage at -20°C, protected from light and moisture, with the vacuum seal left intact until use. Repeated freeze-thaw cycling and humidity ingress through a compromised stopper degrade material faster than brief ambient exposure during shipping. Any clumping or discolouration in what should be a white powder or film warrants flagging the lot rather than using it.

No, and conflating them is the most common costing error in peptide procurement. HPLC purity reports what fraction of the detected material is the target compound, expressed as area percent. Net peptide content, measured by amino acid analysis or nitrogen determination, reports how much actual peptide is in the vial once the trifluoroacetate counterion and residual moisture are accounted for.

Domestic stock removes the customs hold and the unmonitored transshipment leg, so dispatch commonly occurs within 24 hours on business days with tracked delivery. Overseas bulk manufacturers can be economical at large volumes but typically involve multi-week transit, generic rather than lot-specific documentation, and no visibility into temperature exposure during layovers. For single-vial research orders, domestic sourcing is almost always the better trade.

The terminal NH2 group is required for the peptide's characterised binding at KISS1R, the receptor formerly designated GPR54. Incomplete amidation during synthesis produces a free-acid variant differing by roughly 1 Da, which low-resolution mass spectrometry may not separate from the target signal. This is why the mass spectrometry method listed on the COA matters as much as the purity number itself.

Freeze-drying produces a low-density cake that frequently collapses into a thin translucent film on the vial wall during shipping vibration, which reads as empty to the naked eye. Five milligrams of peptide occupies very little visible volume. Provided the crimp seal is intact and the vacuum is holding, the fill weight recorded on the batch documentation is the governing figure, not the visual impression.

At minimum: a batch-specific certificate of analysis with HPLC chromatogram and mass spectrometry identity data, a lot number that matches the vial label, and a clear research-use-only designation on both packaging and paperwork. Suppliers that publish lot-level COA records let you verify all of this before the vial is ever opened.

RESEARCH USE ONLY · NOT EVALUATED BY THE FDA