Kisspeptin-10 achieves greater than 99% purity through automated solid-phase peptide synthesis (SPPS), multi-stage preparative reverse-phase HPLC purification, and trifluoroacetic acid salt exchange. PX1 Research ensures every lot of [Kisspeptin-10](/product/kisspeptin-10) achieves verified >99% purity through independent US third-party HPLC/MS and endotoxin testing, backed by domestic USA manufacturing and same-day dispatch M–F from California and Arizona facilities.
Kisspeptin-10 achieves greater than 99% purity through automated solid-phase peptide synthesis (SPPS), multi-stage preparative reverse-phase HPLC purification, and trifluoroacetic acid salt exchange. PX1 Research ensures every lot of [Kisspeptin-10](/product/kisspeptin-10) achieves verified >99% purity through independent US third-party HPLC/MS and endotoxin testing, backed by domestic USA manufacturing and same-day dispatch M–F from California and Arizona facilities.
Achieving an analytical purity result exceeding 99% for Kisspeptin-10 requires precise chemical synthesis and multi-step chromatographic purification. Because Kisspeptin-10 is a decapeptide (Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2), truncation sequences and deletion peptides can easily form during crude assembly if coupling reagents are unoptimized.
To verify >99% purity, liquid chromatography-mass spectrometry (LC-MS) and analytical reverse-phase high-performance liquid chromatography (RP-HPLC) must confirm both sequence identity and the absence of co-eluting chemical impurities. PX1 Research subjects every synthesis lot to independent US laboratory testing, providing accessible Certificates of Analysis (COAs) for all high-purity research peptides.
Kisspeptin-10 represents the C-terminal decapeptide fragment derived from the precursor KISS1 gene product. Endogenously, it functions as a primary reproductive signaling peptide, serving as an essential upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis.
The primary amino acid sequence consists of ten residues with a C-terminal amide modification: H-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2. The hydrophobic nature of several aromatic residues (tryptophan and two phenylalanine residues) presents unique challenges during synthesis and purification. Improper cleavage conditions can cause tryptophan oxidation or incomplete side-chain deprotection, directly degrading peak area purity on analytical chromatograms if not handled rigorously.
High analytical purity in decapeptide manufacturing relies on optimized solid-phase peptide synthesis (SPPS) using Fmoc (9-fluorenylmethoxycarbonyl) chemistry. During step-by-step assembly, resin-bound amino acids are coupled using high-efficiency activators to prevent deletion sequences.
Following resin cleavage, crude Kisspeptin-10 undergoes preparative reverse-phase HPLC. Using C18 hydrophobic stationary phases and optimized acetonitrile/water gradients containing trifluoroacetic acid (TFA), purification specialists isolate the main target peak while shedding early-eluting hydrophilic fragments and late-eluting hydrophobic side-products. Re-purification cycles refine the material until the integrated UV absorption peak area at 214 nm and 280 nm reliably demonstrates >99% purity.
While RP-HPLC separates chemical species based on polarity, mass spectrometry (MS) verifies exact molecular weight. High-resolution Electrospray Ionization Mass Spectrometry (ESI-MS) or Matrix-Assisted Laser Desorption/Ionization Time-of-Flight (MALDI-TOF) MS confirms that the 99%+ purity peak corresponds precisely to Kisspeptin-10.
Kisspeptin-10 has a theoretical monoisotopic mass of approximately 1301.64 Da. ESI-MS spectrum analysis must display double-charged [M+2H]2+ and single-charged [M+H]+ ions matching calculated theoretical mass values within tight parts-per-million (ppm) tolerances. Without mass spectrometry validation, HPLC alone cannot rule out isomeric impurities or co-eluting peptide artifacts.
When evaluating vendors offering research peptides, laboratory buyers should audit analytical transparency and operational capabilities across specific, standardized parameters:
Purity Verification: Must be conducted via quantitative analytical RP-HPLC with integrated peak area analysis showing >99.0% target mass purity.
Identity Testing: High-resolution ESI-MS or MALDI-TOF spectral verification matching theoretical peptide molecular mass.
Endotoxin Testing: Chromogenic LAL (Limulus Amebocyte Lysate) assay confirming levels below strict research thresholds (<0.01 EU/μg).
Sourcing and Synthesis: USA manufacturing under ISO 9001/GMP-compliant quality controls.
Lot Traceability: Every single vial mapped directly to a batch-specific COA downloadable prior to purchase.
Fulfillment Speed: Orders dispatched same-day Monday through Friday from climate-controlled domestic hubs (California and Arizona).
Researchers looking to order 10 mg vials of Kisspeptin-10 can verify these parameters directly on the PX1 Research portal.
Beyond chromatographic peptide purity, in vitro cell assays and preclinical animal tissue models require stringent control over biological and chemical contaminants. Bacterial endotoxins (lipopolysaccharides) can alter cellular signaling pathways, confound inflammatory marker measurements, and skew HPG axis assay results.
Furthermore, preparative HPLC leaves residual trifluoroacetate (TFA) counterions bound to basic amino acid side chains (such as arginine in Kisspeptin-10). Professional manufacturing protocols involve controlled salt exchange (converting TFA salts to acetate or hydrochloride forms) or thorough lyophilization procedures to ensure low residual TFA content, preserving consistent bioactivity in delicate research environments.
Kisspeptin-10 is supplied as a sterile, lyophilized (freeze-dried) white powder packaged in sealed glass vials. To maintain peptide integrity and prevent chemical degradation, research personnel should adhere to standardized laboratory handling protocols:
Lyophilized Storage: Store unopened vials at -20°C or -80°C in a desiccated environment away from light. Under these conditions, the dry peptide remains stable for up to 24 months.
Reconstitution: Allow the vial to equilibrate to room temperature before opening to avoid moisture condensation. Reconstitute using sterile bacteriostatic water or sterile 0.9% sodium chloride injection solution depending on assay protocols.
Dissolution: Gently swirl or invert the vial. Avoid vigorous vortexing or rapid shaking, which can cause protein shearing or aggregation at liquid-air interfaces.
Aliquoting: After reconstitution, divide the solution into single-use working aliquots and freeze at -80°C. Avoid repeated freeze-thaw cycles, which accelerate peptide hydrolysis.
Distinguishing reliable domestic suppliers from unverified resellers requires examining analytical documentation. Common red flags include:
Generic or Template COAs: Certificates that present identical chromatograms across different batch numbers or lack raw integration table data.
Missing Mass Spectra: HPLC graphs published without accompanying MS reports fail to confirm that the purified peak is the actual target sequence.
In-House Only Testing: Lack of independent, accredited third-party laboratory verification within the United States.
No Endotoxin Quantification: Failure to document bacterial endotoxin levels on lot reports.
To review verified analytical documentation across our full catalog, explore our catalog of research peptides.
In neuroendocrine research, Kisspeptin-10 serves as a crucial tool compound for investigating the upstream regulation of gonadotropin-releasing hormone (GnRH) neurons. Binding to the G protein-coupled receptor KISS1R (GPR54), Kisspeptin-10 stimulates the downstream release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in preclinical models.
Investigators studying reproductive signaling pathways often cross-reference Kisspeptin-10 data with related GnRH analogs and signaling molecules such as Triptorelin or Gonadorelin. Detailed mechanistic summaries and cross-compound comparisons are available in the PX1 Research scientific library.
PX1 Research provides institutional laboratories and independent researchers with reference-grade reagents manufactured under strict quality standards. When you purchase Kisspeptin-10 analytical reports and vials through PX1 Research, your order includes:
Lyophilized 10 mg vials packaged in vacuum-sealed, light-protective containers.
Batch-specific COAs accessible directly online, detailing RP-HPLC purity, ESI-MS mass verification, and endotoxin assay results.
Same-day dispatch for all orders placed before 3:00 PM EST, Monday through Friday, shipping directly from California and Arizona fulfillment centers.
Tracked domestic transit with temperature-monitored carrier options to preserve peptide stability.
Responsive scientific support available to assist research procurement teams. Visit our wholesale peptide ordering program for bulk institutional requests or place single-vial orders online today.
Why does Kisspeptin-10 test above 99% purity?
Kisspeptin-10 tests above 99% purity when synthesized using optimized Fmoc solid-phase peptide synthesis (SPPS) followed by multi-stage preparative reverse-phase HPLC. This process removes truncated sequences and synthesis artifacts. PX1 Research verifies this purity via independent US third-party LC-MS analysis.
How do you verify Kisspeptin-10 purity on a COA?
Purity is verified on a Certificate of Analysis (COA) by evaluating the RP-HPLC chromatogram. The target peak area is integrated relative to all minor noise peaks at 214 nm UV wavelength. A calculated main peak area exceeding 99.0% confirms >99% analytical purity.
What is the molecular weight of Kisspeptin-10?
Kisspeptin-10 (sequence Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2) has a theoretical monoisotopic mass of 1301.64 Da and a average molecular weight of approximately 1302.45 g/mol, which is confirmed via high-resolution mass spectrometry.
Does PX1 Research provide third-party COAs for every lot?
Yes. PX1 Research tests every single production batch through accredited independent US analytical laboratories. Each lot COA includes raw RP-HPLC chromatograms, ESI-MS spectral data, and quantitative endotoxin testing.
What is the role of Kisspeptin-10 in preclinical research?
Kisspeptin-10 is studied in preclinical models as a key neuroendocrine signaling peptide that binds to KISS1R (GPR54) receptors, modulating upstream GnRH release and hypothalamic-pituitary-gonadal (HPG) axis dynamics.
What is the difference between peptide purity and peptide content?
Peptide purity measures the percentage of the target peptide relative to peptide impurities in the sample. Peptide content measures the actual weight percentage of pure peptide relative to counterions (like TFA) and residual water in the lyophilized powder.
How should Kisspeptin-10 be reconstituted in the laboratory?
Reconstitution should be performed using sterile bacteriostatic water or sterile 0.9% saline solution. Gently swirl the vial until dissolved completely; avoid aggressive vortexing to prevent mechanical denaturation.
How fast does PX1 Research ship Kisspeptin-10 orders?
Orders placed before 3:00 PM EST Monday through Friday ship same-day from domestic fulfillment hubs in California and Arizona via tracked carrier services.
What temperature is required for long-term storage of Kisspeptin-10?
Lyophilized Kisspeptin-10 should be stored at -20°C or -80°C in a dry, dark location. Once reconstituted, liquid solutions should be aliquoted and frozen at -80°C to prevent enzymatic degradation.
Can institutions purchase Kisspeptin-10 in bulk from PX1 Research?
Yes. Qualified academic institutions, biotechnology companies, and research facilities can request bulk quantities through the PX1 Research wholesale program.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.