How to Choose Research Peptides by Purity and Lot Documentation

Start with identity, then quantity

Select a research peptide by confirming three things in order: the peptide identity, the vial fill quantity and the purity figure recorded on the certificate of analysis for that lot. Everything else in a purchase record follows from those three fields.

Our catalogue lists nine lyophilized peptides: BPC-157, TB-500, Ipamorelin, CJC-1295 (no DAC), Epithalon, Semax, Selank, MOTS-c and GHK-Cu. Eight are supplied in 5 mg and 10 mg vials. GHK-Cu is supplied as a 50 mg vial. Prices run from $14.99 to $69.99 CAD.

Identity is the first filter because peptide names circulate in several forms. Match the name on your requisition to the name on the vial label and to the name on the certificate of analysis. If the three agree, the lot can be filed without a note. The full listing sits under /product-category/research-peptides/.

For laboratory research use only. Not for human or veterinary use.

The nine peptides side by side

The table below compares fill quantities across the catalogue. Purity is reported per lot on the certificate of analysis; the figure for the lot you receive is the figure that belongs in your records.

Peptide	Vial sizes	Purity method	Documentation
BPC-157	5 mg, 10 mg	HPLC	Certificate of analysis per lot
TB-500	5 mg, 10 mg	HPLC	Certificate of analysis per lot
Ipamorelin	5 mg, 10 mg	HPLC	Certificate of analysis per lot
CJC-1295 (no DAC)	5 mg, 10 mg	HPLC	Certificate of analysis per lot
Epithalon	5 mg, 10 mg	HPLC	Certificate of analysis per lot
Semax	5 mg, 10 mg	HPLC	Certificate of analysis per lot
Selank	5 mg, 10 mg	HPLC	Certificate of analysis per lot
MOTS-c	5 mg, 10 mg	HPLC	Certificate of analysis per lot
GHK-Cu	50 mg	HPLC	Certificate of analysis per lot

Two structural notes are worth recording on a requisition. CJC-1295 is offered in the no-DAC form only, so the label and the certificate both read CJC-1295 (no DAC). GHK-Cu is a copper-containing tripeptide, which is why it is catalogued at a single 50 mg fill rather than the 5 mg and 10 mg pairing used elsewhere.

Reading a certificate of analysis

Every lot we sell carries a downloadable certificate of analysis with HPLC and mass-spectrometry data. HPLC gives the purity figure. Mass spectrometry supports the identity by reporting the observed mass against the expected mass for the sequence.

When you open a certificate, check these fields in sequence:

1. Peptide name — must match the vial label and your requisition.
2. Lot number — the lot number on the label is the key you file against.
3. Purity by HPLC — record the figure as printed, for example ≥98% by HPLC.
4. Mass-spectrometry data — observed mass against expected mass.
5. Quantity — 5 mg, 10 mg or 50 mg, matching the vial.

Testing is third-party. That matters for buyers whose procurement policy distinguishes between supplier-declared purity and purity reported by an independent laboratory. Attach the PDF to the purchase order and the reagent log entry, and the lot is traceable without a second enquiry later.

Choosing 5 mg or 10 mg

Fill quantity is a planning decision, not a quality decision. The same lot may be filled at 5 mg and 10 mg, and the certificate reports the same purity for both.

Consider the 5 mg vial when a protocol is being established and the material will be drawn on once or twice. Consider the 10 mg vial when a defined in vitro series is already scheduled and a single lot number across the series simplifies the write-up. Using one lot across an experimental series removes lot-to-lot variation as a variable in your notes.

Where a study runs long, order enough of one lot at the outset. Later orders may arrive on a different lot with a different certificate, which means a second document in the file.

Storage and packaging on arrival

All nine peptides ship lyophilized. Lyophilized powder is stored cold and kept dry; desiccant travels in the package for that reason. Our orders go out in cold-chain packaging with desiccant and tracked shipping from Vancouver, British Columbia.

On receipt, confirm the vial count, read the lot number on the label, download the matching certificate of analysis and move the vials to cold storage. Log the receiving date against the lot number. That single line links the physical vial, the document and the bench work that follows.

Prices are quoted in Canadian dollars. Shipping is tracked, so the receiving date can be evidenced against the carrier record if a purchasing officer asks.

Consumables to order alongside

Peptide vials are one line on a requisition. Bacteriostatic water and sterile 10 mL glass vials sit under /product-category/lab-supplies/ and are commonly ordered in the same basket so that the bench has matched consumables on hand when the peptide arrives.

Sterile 10 mL glass vials are useful where an in vitro workflow calls for aliquoting into labelled containers. Label each container with the source lot number. If a result is queried months later, the aliquot still points back to a certificate of analysis.

A short buying checklist

Use this sequence when raising an order.

• Name the peptide exactly as it appears in the catalogue, including (no DAC) for CJC-1295.
• Choose the fill: 5 mg or 10 mg, or 50 mg for GHK-Cu.
• Decide how many vials of one lot the planned in vitro work requires.
• Add bacteriostatic water and sterile 10 mL glass vials if the bench needs them.
• On arrival, download the certificate of analysis and file it against the lot number on the label.

We sell to laboratories and qualified researchers only. Storage is cold and dry, documentation is per lot, and the certificate of analysis carries HPLC and mass-spectrometry data for the lot in hand.

For laboratory research use only. Not for human or veterinary use.