Quality & testing
Tested before
it's
listed.
Every lot is assayed by an independent laboratory before it reaches the catalog — purity by reverse-phase HPLC, identity by mass spectrometry, and a unique lot ID linked to its certificate.
99%+
Documented purity
HPLC + MS
On every certificate
Endotoxin
Screened every lot
The methods
Seven checks on every lot
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Reverse-phase HPLC
Purity quantified against reference standards — the headline number on every certificate.
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Mass spectrometry
Molecular identity confirmed by mass-to-charge analysis — the compound is what the label claims.
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Net peptide content
The actual peptide mass per vial — so your dosing math starts from a real number, not a label.
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Endotoxin (LAL)
Screened for bacterial endotoxins to a defined threshold on every lot.
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Appearance & solubility
Visual inspection of the lyophilate and reconstitution behavior before the lot is released.
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Heavy metals
Trace elemental contaminants screened against safe limits.
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Lot-level archival
Each batch carries a unique lot ID linked to its COA — pull the exact paperwork for the exact vial.
The process
From synthesis to your bench
-
01
Synthesized to spec
Produced to a defined specification and lyophilized to a shelf-stable powder — sealed against light and moisture.
-
02
Independently assayed
A sample is sent to an independent laboratory for HPLC purity and mass-spec identity. We don't grade our own work.
-
03
Certificate published
The COA is archived against the lot ID and made available before the compound is ever listed.
-
04
Sealed & dispatched
Vials are sealed and shipped discreetly, and the matching certificate is published in your account.
On the certificate
Documented, not claimed
A certificate is only useful if it's specific. Every Onx COA ties a result to a lot you can verify — and it's published for you to check.
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HPLC purity against reference standards
-
Mass-spec identity & molecular weight
-
Endotoxin tested unique lot ID on every certificate
