An external quality-system inspection rarely begins with a demand to see every product a laboratory has ever bought. It more often begins with a sample: why this item, why this batch, how it was stored, and what evidence links the material on the shelf to the work recorded in the notebook. For UK laboratories using research-use-only (RUO) materials, the risk is not that a supplier catalogue exists; it is that the catalogue quietly becomes a formulary — a standing list treated as though inclusion alone proves suitability. It does not. A catalogue is a commercial and scientific reference point. A formulary is a controlled approval list, and in a regulated environment it carries assumptions that do not transfer to in-vitro research materials. The distinction matters when inspection evidence must show selection, traceability and control.
Begin with the In-Vitro Question, Not the Catalogue List
A defensible catalogue filter starts before the catalogue is opened. The research team should define the in-vitro question, the assay format, the controls, the role the material is expected to play, its compatibility with the planned solvent system, and the analytical endpoint. Only then should a supplier listing be reviewed. This sequence prevents item-driven selection, where a catalogue entry becomes attractive because it is visible, familiar or conveniently packaged, rather than because it meets a documented experimental need. For inspection purposes, the question is not “Is this item in the catalogue?” but “Why was this item selected for this study, and what evidence supports its use?”
Useful filters include documentation, physical form, storage requirements, safety and disposal, and the quantity needed for the planned work. A listing should be treated as a prompt to check the individual product page, the stated RUO status and the batch-specific CoA. Research Sciences describes its catalogue as supplying high-purity research peptides, laboratory accessories and preparation tools for controlled in-vitro studies. That description may help a researcher identify the range, but it does not replace a study-specific justification. A storage container, a lyophilised research peptide or a 10ml bacteriostatic water/mixing water listing each needs its own reason for being in the selection file. All materials remain not for human or veterinary use, and they must not be presented as medicines, medical devices, injectables, treatments or food supplements.
Keep the Formulary Mindset Out of the Selection File
Avoid language such as “approved catalogue” or “standard peptide list” unless the laboratory has a genuine, controlled approval process behind it. Better wording is “selected for study X under protocol Y” or “retained for in-vitro assay Z following documented review”. Record why alternatives were excluded, not only why the chosen item was included. This turns a catalogue browse into inspection evidence. It also reminds materials managers that the commercial listing is not a clinical formulary and does not grant therapeutic, diagnostic or veterinary status to any item. The purchaser remains responsible for lawful use, safe handling, storage, disposal and compliance with relevant UK requirements such as COSHH and laboratory safety standards.
Build a Traceable Bridge from Catalogue Entry to Batch Record
The catalogue entry and the batch record are not the same thing. A product page may show current listing wording, pack size and handling guidance, but the batch CoA is the document that must be opened and checked for the specific material received. Vial labels use a reference format combining SKU code and expiry date, for example BPC10-03/27, and that reference should be quoted when asking the supplier about documentation. The laboratory’s selection record should capture the item name, catalogue reference, label reference, intended in-vitro application, CoA file location, storage condition, responsible person and review date. This is a practical bridge between procurement and the quality system.
For a current view of the range, the shop’s Buy peptides uk category page should be treated as a live catalogue to review, not as a pre-approved list; each entry still needs a study-specific justification and a batch CoA check. Research Sciences states that CoAs are provided for products, with HPLC purity and identity information, while the About page describes a broader testing framework including heavy metals and endotoxin evaluation. The homepage also lists “CoAs Janoshik Analytical Reports”. These are supplier-published descriptions, not independent audit findings for every batch, so researchers should open the CoA that accompanies the specific batch and reconfirm any published figure, such as the homepage’s “≥99% Verified Purity” wording, against that document.
Two documentation details deserve particular care before inspection. First, restocked products may carry the same Internal Test Reference (ITR) as earlier stock; an ITR links to associated sample testing reports, but it does not confirm that separate deliveries come from the same production lot or that they have had separate independent testing. Second, vial cap colours and other packaging may vary, and cap colour is not an indicator of identity, analytical quality or manufacturing origin. Where reconstitution is part of an in-vitro workflow, record diluent volume and target assay concentration in laboratory terms only; the shop’s calculator is for laboratory research use and must not be used for human or veterinary purposes. Materials remain not for human or veterinary use.
Reconcile, Segregate and Reconfirm Before the Inspector Arrives
Inspection readiness is built by reconciliation, not by a last-minute tidy-up. Before an external quality-system inspection, compare the physical inventory with the selection register and the CoA files. Check that each RUO item is labelled in line with the shop’s stated “For Research Use Only – Not for Human Consumption” position, that storage records match the product page and CoA guidance, and that lyophilised materials are kept at –20°C or below, sealed with desiccant and protected from moisture, heat and light. Review freeze–thaw history and short-term 2–8°C storage records for reconstituted materials used in laboratory workflows. Confirm that staff handling records, COSHH assessments and disposal arrangements are current. A catalogue cannot supply those records; the laboratory must.
Procurement evidence should also be easy to reconcile. Research Sciences’ published terms state that orders are dispatched the next working day and shipped via Royal Mail Tracked 24, which usually delivers the following working day as a Royal Mail estimate; delivery times may vary in peak periods and should not be treated as a guaranteed arrival promise. The same published terms should be reconfirmed at checkout. Because of the specialist and perishable nature of the goods, the shop states that returns are not accepted once dispatched, with refunds only for damage, incorrect supply or quality issues as set out in its Refunds & Returns Policy. Materials managers should retain dispatch and receipt records alongside the selection file, but they should avoid presenting those records as evidence of product suitability for any purpose beyond controlled in-vitro research.
A realistic scenario is a laboratory preparing for inspection and finding that its catalogue folder contains many items with no clear study link. Instead of treating the whole folder as an approved formulary, the team creates a filtered register: BPC-157 10mg is linked to a named in-vitro protocol and CoA; a storage container is justified as laboratory equipment; an unused listing is removed from the active selection file. When the inspector samples one entry, the laboratory can show the research question, why that item was selected, the batch CoA, the label reference, storage records and training evidence. If the catalogue changes, the register is version-controlled and reviewed again. That is the difference between a supplier catalogue used as a discovery tool and a formulary used as an unexamined approval list. All stock remains not for human or veterinary use, and the inspection file should make that boundary visible at every step.
Gdańsk shipwright turned Reykjavík energy analyst. Marek writes on hydrogen ferries, Icelandic sagas, and ergonomic standing-desk hacks. He repairs violins from ship-timber scraps and cooks pierogi with fermented shark garnish (adventurous guests only).