What is it, actually?
Mass spectrometry confirms the molecule matches its name by measuring its mass. Without an identity check, an impressive purity figure can simply describe 98% of the wrong compound.
United Kingdom · MHRA framework
Read the certificate, then buy your peptides.
In the UK, a research peptide is only as trustworthy as the independent Certificate of Analysis behind its lot number.
This is a plain-English register of how to verify HPLC purity, confirm identity, and check UK dispatch before a single vial changes hands. We teach the standard — we do not sell.
✓ HPLC purity ≥ 98%
✓ Independent lab COA
✓ UK dispatch
The standard
Three things a UK buyer verifies before paying
The label is a claim. The Certificate of Analysis is evidence. In a market the MHRA does not license as medicine, the burden of proof sits with the paperwork — and it is easier to read than most people assume.
How pure is the batch?
HPLC reports purity as a percentage of the target peptide. For research work the commonly cited threshold is at least 98%, with the chromatogram attached so the main peak can be seen — not just a headline number.
Who tested it, and where does it ship?
A seller cannot objectively certify its own product. An independent, accredited lab issues the COA free of conflict, and UK dispatch keeps the batch out of international customs — a cleaner paper trail end to end.
Field by field
Reading a Certificate of Analysis
A serious COA is issued for one specific batch, not for a product line in general. Here is what each field is telling you, and what to be suspicious of.
1
Lot / batch number
The COA must reference the exact lot you are buying. A certificate that matches no specific batch certifies nothing.
2
HPLC purity & chromatogram
Look for the percentage and the trace. A single dominant peak with a stated area percentage is the evidence behind the number.
3
Mass-spectrometry identity
Confirms the molecular mass matches the expected target. Purity without identity is only half a check.
4
Independent, accredited lab
The most valuable signature on a COA is one the seller could not have written. Independence is the whole point.
5
Water content & appearance
Karl Fischer water content and a physical description round out a batch record and flag storage or handling problems.
6
Date, method & signature
A recent test date, the analytical method used, and a named signatory turn a nice-looking page into an auditable record.
The UK context
What the MHRA framework means for a research buyer
The Medicines and Healthcare products Regulatory Agency (MHRA) licenses medicines for human use in the United Kingdom. Most research peptides are not MHRA-licensed medicines — they are supplied for laboratory use only. That is not a loophole to celebrate; it is exactly why the Certificate of Analysis carries the weight. In an unlicensed category, the independent lab report is the only objective evidence of what a vial contains.
Not a medicine
Research peptides are generally not MHRA-approved for human use — verify the compound's current status.
Evidence over claims
With no licensing body vouching for the batch, an independent COA is the substitute for regulatory assurance.
UK dispatch
Domestic dispatch avoids international customs holds and keeps a cleaner, faster paper trail.
Common questions
UK peptides & COA, answered plainly
Is it legal to buy research peptides in the UK?
Most research peptides are not licensed by the MHRA as medicines for human use and are commonly supplied strictly for laboratory and research purposes. Legality depends on the specific compound and its intended use; several peptides also intersect with medicines legislation and anti-doping rules. This site is educational and does not provide legal or medical advice — verify the current status of any compound before you buy.
What should a Certificate of Analysis show before I buy?
A meaningful COA is issued for one specific batch by an independent, accredited laboratory. It should report purity by HPLC (commonly at least 98%), confirm identity by mass spectrometry, and reference the exact lot number tested. A seller's own headline claim, with no attached independent lab report, is marketing rather than verification.
Does the MHRA approve research peptides?
The MHRA licenses medicines for human use in the UK. Research peptides sold for laboratory use are generally not MHRA-approved medicines, which is precisely why an independent Certificate of Analysis matters — it is the only objective evidence of what a batch actually contains.
Why does UK dispatch matter?
A supplier that dispatches from within the United Kingdom avoids international customs clearance, which means fewer border holds, faster delivery, and a clearer paper trail. UK dispatch does not replace the need for an independent COA — you still verify the batch by HPLC and lot number.
Does The Standards Register sell peptides?
No. We are an information and education resource for UK research buyers. We do not sell products, do not capture email, and do not give medical advice. We teach you how to read a Certificate of Analysis and verify a batch. Consult a licensed physician before considering any use.
Once you can read the certificate
You are ready to buy on evidence.
We keep a single UK-relevant supplier reference behind the next page, alongside a reminder to verify the COA yourself. No email, no sign-up.
See the verified UK supplier