Two independent checks, every lot
Every production lot goes through two independent verification steps before it's released for sale: reverse-phase HPLC purity analysis and mass-spectrometry identity confirmation. Purity alone doesn't confirm you have the correct compound — a high-purity sample of the wrong sequence is still the wrong sequence. Both checks matter, and both are included in every COA.
What happens when a lot fails
If a lot doesn't clear our purity threshold, or the mass-spec result doesn't match the intended sequence, it does not ship. We don't blend a failed lot into a passing batch to bring the average up, and we don't discount out-of-spec material instead of discarding it. This is the single biggest practical difference between a documented research peptide supplier and one that isn't.
Consistency across orders
The same testing standard applies whether you're ordering a single 5mg vial or placing a wholesale order through a lab account. Volume pricing never means reduced verification.