Inside the Reta Research Batch Verification Process

At Reta Research, checking a research compound is not a box we tick at the end — it is a hard gate that stands between every incoming batch and the point of sale. Nothing reaches a UK researcher until an accredited independent laboratory has analysed it and our own team has weighed the results against fixed pass criteria. This page sets out that workflow in full; the verified certificates behind it are published on our COA page.

Three principles behind our verification

The batch journey from goods-in to release

From the moment a batch lands at our UK facility, this is the order of events it moves through:

1. Goods-in & loggingThe batch is booked in and linked to its own internal batch reference, keeping it traceable from arrival all the way to sale.
2. Quarantine holdThe stock is switched to a non-sellable quarantine state. While it waits on results it cannot enter inventory, be picked or be shipped.
3. Representative sampling & sealingRepresentative vials are drawn from the lot, sealed and readied for dispatch under chain of custody, so what the lab receives genuinely comes from the batch in hand.
4. Independent third-party analysisThe sealed samples go to an accredited laboratory (Janoshik Analytical or Analiza Białek) for HPLC purity quantification and mass spectrometry identity confirmation.
5. Review against pass criteriaBefore any call is made, our team measures the returned data against fixed criteria — percentage purity, the correct molecular weight and identity, and related substances within limits.
6. Release or rejectA batch that clears every criterion has its Certificate of Analysis published on the COA page and is cleared for sale. One that does not is rejected and never made available to researchers.

The analytical methods we lean on

• HPLC (High-Performance Liquid Chromatography) — measures percentage purity and flags any related substances or degradation products present in the sample.
• Mass spectrometry — checks the molecular weight of the compound and pins down its identity, confirming the vial holds the peptide it is labelled as.
• Supplementary assays — where a compound's profile calls for extra scrutiny, further analytical methods are commissioned.

Pass criteria & the release decision

A Certificate of Analysis by itself does not settle it — the figures still have to clear our thresholds. Ahead of release we look for:

• Purity — HPLC purity meeting our target threshold (typically ≥ 99%) across the vials tested.
• Identity — mass spectrometry confirming the molecular weight expected for the declared compound.
• Related substances — impurities and degradation products held within acceptable limits.

Miss any one of these and the batch stays quarantined and is rejected — it is never sold just to keep shelves full. That is precisely why the certificate you view always maps to the exact lot in circulation now, and never to an earlier batch.