Receiving a Research Peptide Shipment: What to Check on Arrival
The first few minutes after a shipment arrives are the point at which most correctable problems can still be caught. A short receiving routine is worth formalising.
Inspect before opening anything
Check the outer packaging for damage and the vials for cracks, compromised crimp seals or loose caps. Then look at the cake itself. A lyophilised peptide should be a white to off-white solid. Discolouration, or a cake that has collapsed into a glassy film or an obvious liquid, indicates the material has been exposed to moisture or heat in transit and should be raised before use.
A shrunken or partially detached cake is not by itself a fault — lyophilised cakes shift in transit — but a wet or melted appearance is.
Transit and temperature
Lyophilised peptides are considerably more robust in transit than solutions, which is the main reason they ship as powder. Brief exposure to ambient temperature during shipping is normal and is not the same as prolonged warm storage. The material should still go into refrigerated storage at 2–8 °C on arrival, without opening the vial — see our storage guidance.
Canadian shipping
We ship across Canada, with free shipping on Canadian orders over $200, and to the United States at a flat rate. Domestic Canadian transit avoids the customs step entirely, which removes the main source of unpredictable delay and of extended time at uncontrolled temperature — a practical argument for sourcing domestically when the compound is available from a Canadian supplier.
On the regulatory framing of these materials, see our note on the regulatory status of research peptides in Canada and on choosing a supplier.
Match the vial to its certificate before it goes into storage
This is the step most often skipped, and the only one that cannot be done later. A certificate of analysis describes one production lot. The claim it makes is about that lot and no other, so a certificate is only evidence about the vial in front of you if the lot identifiers agree.
How that match is made depends on the supplier. Where vials carry a printed lot or batch identifier, compare it against the identifier on the certificate, along with the compound name and nominal mass. Where they do not — which is common in this market — the certificate should carry photographs of the batch it describes, and the vial in your hand is matched against those: cap colour, crimp colour, label and cake appearance. ExoLabz certificates are published per product on this site and include batch photographs for exactly this purpose; vials are matched by cap and crimp colour rather than by a printed batch number.
Either way the point is the same. A certificate that cannot be tied to the vial in front of you is a document about material you may not have. If nothing in the certificate corresponds to anything on the vial, ask the supplier which batch was shipped and record the answer. Our guide to reading a certificate of analysis covers what the rest of the document is telling you.
Save the certificate as a file alongside your own receiving record. A link is not a record: pages get reorganised, and a certificate you can no longer retrieve is a certificate you no longer have.
Photograph what arrived
Two photographs, taken before anything is opened, settle almost every dispute that can arise later: one of the outer packaging as delivered, and one of the vials with the labels legible. If a cake looks wrong, photograph that too, in even light and without the flash washing out the colour.
The reason is not suspicion. It is that any later conversation — with a supplier, an institution, or your own notes in three months — turns on what the material looked like on arrival, and memory is not admissible evidence about the colour of a lyophilised cake.
Seasonal transit, which is a Canadian problem specifically
The last hundred metres of a Canadian delivery are the least controlled part of the journey. A parcel can sit in a delivery vehicle through a July afternoon or on an unheated porch through a January night, and both are outside anything a supplier can manage.
Two practical measures cover most of it. Arrange delivery for a day when someone will be there, or to an address that is attended, rather than to a porch. And bring the parcel to refrigerated storage promptly rather than leaving it on a bench because it arrived as powder and powder seems robust. Lyophilised material is genuinely tolerant of short transit exposure; what it does not tolerate is being treated as shelf-stable indefinitely. See storage and stability of lyophilised research peptides.
A frozen parcel is generally less concerning than a warm one for lyophilised powder, but repeated freeze–thaw of a vial that has taken up moisture is not, which is another reason the cake’s appearance on arrival is worth recording.
If something looks wrong
Stop before opening the vial. An unopened vial with a documented problem is a straightforward conversation; an opened one is an argument about what happened after opening.
Raise it with the supplier with the batch details, your photographs and the delivery date. Note it in your receiving record whether or not it is resolved, because a batch that produced an odd result and a batch that arrived looking odd are worth being able to connect.
Record what you received
Log the date of receipt, the compound, the quantity and the certificate you matched it against. When a result later looks anomalous, that record is what lets you rule the material in or out rather than repeating the work.
ExoLabz supplies compounds for laboratory research use only. Nothing on this page is medical advice or a suggestion of human or veterinary use. Certificates of analysis for each compound are published on this site.
