Supplier COA included. Your release is still yours.
A supplier-issued lot COA is sent with each package. However, our terms of use explicitly require the retailer to test product upon receipt. The certificate is a baseline reference — not a substitute for independent analytical testing.
Per lot
- Lot ID
- Unique identifier on the paperwork, traceable back to us
- COA
- Supplier-issued certificate of analysis for that lot
- Identity
- Product name and stated specification as listed in the catalog
- Quantity
- Vial count and fill
- Handling
- Storage temperature and handling conditions
- Terms
- Research use only statement on invoice and packing documentation
What a supplier COA is worth
- Knowing which tests were reported on a specific lot.
- Giving your laboratory a baseline to compare against.
- Tying material to a lot identifier you can trace back.
- Covering the vials you label and sell.
- Discharging your incoming quality and release obligation.
- Saying anything about safety or suitability for use in humans or animals.
- Replacing a test on the container that arrived at your door.
Standard certificates omit expensive work
A typical supplier COA stops at identity and a purity number. That is usually cost, not conspiracy. The analyses below are what a serious incoming program often wants — and what many buyers never commission, because each line item can cost as much as the box itself.
- Endotoxin (LAL) Bacterial endotoxin load. Routine on injectable-grade materials; routinely absent from peptide COAs.
- Heavy metals Lead, arsenic, cadmium, mercury and related contaminants from synthesis and handling.
- Residual solvents Process solvents left from manufacture — not the same claim as a purity percentage.
- Related peptides / impurity profile What else is in the vial besides the named compound.
- Content / assay How much of the labeled peptide is actually there, not just that something matching the name is present.
- Water content (Karl Fischer) Residual moisture that affects mass and stability.
- Counterion / salt form Acetate, TFA, HCl, free base — the label claim changes with the salt.
- Bioburden / sterility Microbial load when your use case requires it.
We price inventory so you keep margin to commission the panel that fits your release criteria. For the regulatory and empirical framing, see the dedicated page.
Supplier COAs: analytical gaps & regulatory realityA minimum structure for your own program
This is a framework, not a protocol. Your analytical scope, acceptance criteria, and laboratory selection are decisions only you can make, and they should be written down before the first order arrives.
Write your specification first
Decide what you require on identity, purity, and any other attribute that matters, and record it. A specification written after a result arrives is not a specification.
Sample the vials you received
Test material drawn from your own shipment, not from a sample supplied separately. Record who sampled it, when, and how.
Use a laboratory you selected
Choose the lab yourself and keep the raw report. A result you cannot produce on request is not usable evidence.
Release or reject in writing
Record the decision against your specification, signed by whoever holds that authority in your business.
Map our lot to your lot
Keep a mapping from our lot identifier to your finished labeled units so any vial you sold can be traced back in one step.
Retain a sample
Hold a retained sample of each lot you released for as long as your own policy requires.