Quality · Standards
We ask one question
of every lot.
Is this good enough to ship?
The honest answer is sometimes no. When it is, the lot doesn't leave the lab — regardless of cost, regardless of timeline. The standard is the standard.
The promise
Research-grade isn't a marketing word here.
The peptide market is full of vials with confident labels and vague provenance. We built Ascénd because that wasn't a category we wanted to participate in.
Every peptide on this site comes from a synthesis facility operating under cGMP-aligned protocols, is independently tested by a third-party ISO 17025 lab, and ships with a Certificate of Analysis that documents your specific lot—not a template, not a category average.
If a batch doesn't meet our spec, we destroy it. The economic incentive to ship borderline product is real. We pay that cost so you don't have to absorb the variance into your work.
Spec sheet
The pipeline
Seven gates between synthesis and your bench.
Each gate has a documented spec and a pass/fail outcome. Borderline lots come back through the pipeline a second time. Failed lots are destroyed and logged.
Synthesis
USP-grade precursors. Lot-isolated runs to prevent cross-batch carryover.
HPLC purity
Reverse-phase HPLC quantifies purity by area-percent. Reject floor: 99.0%.
Mass spec
ESI-MS confirms molecular weight matches reference standard to within ±0.5 Da.
Endotoxin
LAL gel-clot screen. Spec: <0.25 EU/mg. Anything else fails.
Sterility
USP <71> direct inoculation. 14-day incubation window before release.
Lot numbering
Each vial laser-etched with the lot number that ties back to its full analytical record.
COA issuance
Signed PDF generated, attached to every order, also published to the public lookup tool.
Inside a Certificate of Analysis
Every line on the document is a checkpoint.
Hover any field on the COA — or its explainer — to see what it means and why we put it there.
Ascénd Research
Certificate of Analysis
Issued
05 / 18 / 2026
Third-party verified
Signature on file
From our lab
“The fastest way to lose a research customer is to ship one bad lot. The fastest way to keep one is to be willing to destroy a good one when the data says so.”
Lab Director
Ascénd Privé · Analytical Quality
Independent verification
Our third-party lab partner.
We don't test our own product. Every COA carries the name and accreditation of the independent ISO 17025 lab that ran the analysis. Read more about how we vetted them and what their accreditation actually covers.
Verify your lot
Don't take our word for any of this.
Pull up the Certificate of Analysis for the exact lot you received. It's the same document we generated when the lot was released.