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UK Buying Guide
Where to Buy KPV in the UK
KPV is a short tripeptide, which makes it cheap to synthesise and easy to substitute. Identity confirmation matters here more than on most compounds. This guide explains what to check and what is available.
Lot-matched COAMass-spec identityNext working day UKDiscreet outer packaging
Overview
What Is KPV?
KPV is a tripeptide fragment (lysine-proline-valine) derived from the C-terminal sequence of alpha-melanocyte-stimulating hormone. It is studied for its role in inflammatory pathway modulation in research models. Its short sequence means mass spectrometry identity confirmation is the primary check, not purity alone. It is supplied as lyophilised powder in a sealed vial.
Classification
Tripeptide research compound
Format supplied
vial
Residue count
3 amino acids (lysine–proline–valine)
Parent sequence
C-terminal tripeptide fragment of alpha-MSH
Purity specification
99% minimum by HPLC with the trace included in the batch pack
Research use only
Not a medicine. Not for human or veterinary consumption.
Available Options
KPV Options Available From Arma Peptides
KPV is supplied in a single lyophilised vial size. On a tripeptide, compare listings on net peptide content rather than headline milligrams, because the salt fraction varies between suppliers.
Product
Format
Size
Price
Stock
Due Diligence
KPV Is Three Residues — Which Changes What You Check
KPV is a tripeptide, the shortest compound in this catalogue apart from none. At that length, purity is easy and identity plus net content are where the real questions sit.
- STEP 01
At Three Residues, 99% Purity Is Cheap
Almost any competent synthesis produces high-purity KPV, so a purity figure alone carries very little information here. Ask what fraction of the vial mass is peptide rather than counterion and moisture.
- STEP 02
Salt and Water Dominate the Vial
On a tripeptide the salt and residual water fraction is proportionally large. Net peptide content is therefore the number that determines whether the price per milligram you calculated is real.
- STEP 03
It Is an α-MSH Fragment
KPV corresponds to the C-terminal tripeptide of alpha-MSH. A supplier who cannot state that relationship probably has not read their own COA, and it also rules out confusion with unrelated three-letter products.
- STEP 04
Hygroscopy Means Sealing Matters
Short, charged peptides pull water from the air. The vial should arrive properly sealed and under vacuum; a sticky or clumped powder has already been exposed.
This compound is sold for in-vitro and laboratory research only. It holds no UK marketing authorisation and must not be administered to humans or animals.
Handling & Delivery
KPV Handling: Short Peptides, Different Rules
Tripeptides are chemically stable and physically annoying. Almost all KPV problems are moisture problems.
Bring the Vial to Room Temperature First
Open a cold vial in a warm room and moisture condenses straight onto the powder. Let it equilibrate sealed before breaking the seal.
Dissolves Fast and Cleanly
Unlike hydrophobic peptides, KPV goes into aqueous solution readily. If it does not dissolve promptly, record that as an identity question rather than a technique question.
Solution Stability Is Good
Refrigerated at 2–8 °C, reconstituted KPV is comparatively stable for a peptide, though aliquoting is still better practice than repeated re-entry.
Dispatch and Cover
Same working day dispatch before the cut-off, tracked, plain outer packaging, and 48-hour photographic damage cover for replacement or full refund.
FAQ
KPV in the UK: Questions Researchers Ask Before Ordering
+Is KPV legal to buy in the UK?
Yes, as a laboratory research chemical. It is not a licensed medicine and must not be supplied or used for human or veterinary purposes.
+What is KPV derived from?
It is the C-terminal tripeptide of alpha-melanocyte-stimulating hormone, lysine–proline–valine, studied in inflammation and epithelial research models.
+If purity is easy at three residues, what should I check instead?
Net peptide content, the counterion, residual moisture and identity confirmation. Those four determine what is actually in the vial; a 99% purity line on a tripeptide is close to a given.
+Why does identity confirmation matter more for short peptides?
A three-residue peptide is inexpensive to synthesise, and an incorrect sequence can still return a high HPLC purity figure because purity measures how much of one thing is present, not what that thing is. Mass spectrometry is what confirms the molecular weight matches the declared sequence.
+Is KPV related to alpha-MSH?
Yes. KPV corresponds to the C-terminal tripeptide of alpha-melanocyte-stimulating hormone, which is why it is studied in the same research context despite being a far smaller molecule.
+Why did my KPV powder clump?
Moisture. Short charged peptides are hygroscopic, and a cold vial opened in a warm room condenses water immediately. Always equilibrate to room temperature before breaking the seal.
+How should reconstituted KPV be stored?
Refrigerated at 2–8 °C and protected from light. It is more forgiving than long peptides, but single-use aliquots remain the better practice for reproducible work.
+Can I return an unopened KPV vial?
Yes, within 14 days of receipt, unopened and in original sealed packaging. Unsealed vials are excluded for health-protection reasons and statutory rights on faulty goods still apply.
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