Our partner lab · ISO 17025
We don't grade
our own homework.
Every lot of every peptide we sell is analyzed by an independent, ISO 17025-accredited laboratory with no ownership, equity, or performance-tied compensation from Ascénd. That arm's-length relationship is the whole point.
Why an outside lab
An incentive you can't hide from.
Self-testing peptide suppliers exist. The math on why they shouldn't is straightforward: when the same entity synthesizes a lot, tests it, and decides whether to ship it, every borderline batch has an economic argument to pass.
We chose to remove that incentive entirely. Our testing partner is paid the same fee whether a lot passes, fails, or comes back borderline. No discount for high pass rates. No bonus for fast turnaround. Just methodology, reported honestly.
We don't publish their name on every page because the story isn't about a brand — it's about the structure. Genuine independence isn't a logo; it's a contract.
The structural firewall
ISO 17025 · what it actually covers
The accreditation behind the badge.
ISO/IEC 17025 is the global standard for testing and calibration laboratories. It's not a logo — it's a four-part commitment, audited by recognized accreditation bodies.
Technical competence
Auditors verify that every analyst on staff is qualified for every method they sign off on. Competence is documented per method, per technician — not assumed by role.
Calibrated equipment
Every instrument is calibrated against traceable reference standards on a documented schedule. Out-of-tolerance equipment is quarantined immediately and any results from the affected window are re-run.
Validated methods
Each test method is documented, validated, and revision-controlled. A method change requires re-validation before any client samples are run on it.
Regular audits
Surveillance audits annually. Full re-assessment every two years by an accreditation body recognized under the ILAC-MRA. Findings are corrected on a published timeline.
Methods & standards
What runs on every lot.
Every Ascénd lot is subjected to the same four-method analytical battery, every time. No category-skipping based on peptide type.
Test
Instrument
Standard / method
Spec
Purity
Reverse-phase HPLC
USP <621> · area-percent
≥ 99.0%
Identity
ESI mass spectrometry
Positive-ion mode · peptide ref. standards
± 0.5 Da
Endotoxin
LAL gel-clot
USP <85>
< 0.25 EU/mg
Sterility
USP <71> sterility cabinet
Direct inoculation · 14-day incubation
No growth
From vial to COA
Fifteen days, documented end-to-end.
The full chain of custody from finished lot to signed Certificate of Analysis. The 14-day sterility window is non-negotiable — it sets the floor.
Day 0
Sample drawn
A statistically valid sample is pulled from the finished lot under our QC protocol. The remaining lot is sealed and quarantined.
Day 1
Custody transfer
Sample is shipped under tamper-evident seal with a chain-of-custody form. Lab acknowledges receipt the same business day.
Day 2–4
Analysis
HPLC, mass spec, endotoxin, and sterility methods run in parallel. Borderline results trigger an automatic re-run before reporting.
Day 14
Sterility window closes
USP <71> incubation runs the full 14 days. Sterility cannot be rushed — the calendar drives release, not deadlines.
Day 15
COA signed
Signed PDF generated by the lab and transmitted back to us. Released lots move to packaging; failed lots are destroyed and logged.
See the output
Every lot we've released, looked up by number.
The COA generated at the end of this fifteen-day window is the same document available in our public lookup tool. Enter any lot number that's ever shipped — you'll get the data the lab signed off on.