Every batch verified before it earns a label.
PEPTiQX releases nothing without an independent certificate of analysis — purity by HPLC-UV, identity by LC-MS, net content confirmed. Search any batch number and read the exact certificate that shipped with your vial.
Featured research peptides
Lyophilised, batch-tested and shipped with the certificate that belongs to your lot.
The catalog is for account holders
Compounds, purities and pricing are visible once you have an account. It is free, takes a minute, and opens the COA library too.
Verification you can check yourself
Trust in this category should be auditable, not asserted. Every claim we make is backed by a document you can open.
Batch-level certificates
Not a representative COA from a lot made two years ago — the certificate for the batch number on your vial.
Independent laboratories
Purity and identity are measured by accredited third-party labs. We never self-report an assay result.
Out-of-spec is destroyed
Batches below 98% are quarantined and destroyed. We do not blend, re-test to pass, or quietly downgrade.
Full analytical panel
HPLC-UV purity, LC-MS identity and gravimetric net content on every released lot.
Same-day dispatch
Orders before 3 PM AZ leave the same business day, in insulated packaging appropriate to the sequence.
Researchers on support
Questions about handling and reconstitution are answered by people who have done it.
A release specification we do not negotiate with
Purity below 98.0% does not ship. Identity that does not confirm against the calculated monoisotopic mass does not ship. The commercial cost of destroying a failing batch is the entire point of having a specification.
Research areas
Organised by the research context these materials are used in.
Metabolic Research
Metabolic and endocrine research peptides
Browse →Tissue & Matrix Research
Tissue, collagen and matrix research
Browse →Neuropeptides
Neuropeptide research standards
Browse →Cosmetic & Dermal
Dermal and cosmetic science research
Browse →Lab Supplies
Solvents, diluents and consumables
Browse →Growth Hormone Secretagogues
Secretagogue and releasing-peptide reference standards.
Browse →Melanocortin Research
Melanocortin receptor reference peptides.
Browse →Research Compounds
Small molecules and cofactors.
Browse →Storage & Accessories
Vial cases and lab consumables.
Browse →From order to bench
Place your order
Certify research use at checkout and pay through our secure processor. We never see your card details.
We pull your lot
Your vial is picked from a specific batch, and that batch's certificate of analysis is attached to your order.
Same-day dispatch
Orders before 3 PM AZ ship the same business day in insulated packaging.
Verify on arrival
Match the batch number on the label against the COA library before you open anything.
What researchers tell us
The batch-searchable COA library is the reason we switched. Matching a certificate to a lot number should be table stakes and almost nowhere does it.
Purity numbers move between lots and PEPTiQX publishes that rather than hiding it behind one flattering certificate. That candour is worth more than a decimal place.
Support answered a reconstitution question about a Met-containing sequence with actual chemistry instead of a canned reply.
Common questions
How is purity measured?
Purity is determined by reverse-phase HPLC with UV detection, typically at 214 nm where the peptide bond absorbs. The reported figure is the target peak area as a percentage of total integrated peak area. Our release specification is ≥98.0%.
How do you confirm identity?
Identity is confirmed by LC-MS. The measured mass is compared against the expected monoisotopic mass calculated from the sequence. A batch that does not match is not released, regardless of its purity number.
Who performs the testing?
Testing is performed by independent ISO/IEC 17025 accredited laboratories — we do not self-report purity. The laboratory that tested your specific batch is named on the certificate of analysis.
Can I get the COA for the exact vial I received?
Yes. The batch number is printed on your vial label. Enter it in the COA library and you will get the certificate for that specific lot, not a representative sample.
What happens if a batch fails specification?
It is not released for sale. Out-of-specification material is quarantined and destroyed. We do not blend, re-test until pass, or downgrade failing lots.
New batch releases, as they post
A short email when new lots clear testing and their certificates go live.
New batch releases and COA postings. Unsubscribe anytime.
