Quality
What we measure, how we measure it, and what we refuse to release
A peptide you cannot verify is an unknown rather than a reagent. Below is the specification we release against and the methods used to establish it. Where a lot has been assayed the data is published in full rather than summarised; where it has not, the product page says so.
Analytical methods
01
Reverse phase HPLC
Purity
C18 column, water/acetonitrile gradient with 0.1% TFA, detection at 220 nm. Purity is reported as the area percentage of the principal peak. Our release specification is ≥98.0%; lots that do not meet it are rejected rather than downgraded and sold.
02
Electrospray ionisation mass spectrometry
Identity
Observed mass is compared against the theoretical monoisotopic mass for the stated sequence. A lot is released only when the observed mass confirms identity within instrument tolerance.
03
Karl Fischer titration
Residual moisture
Residual water in lyophilized material is the principal driver of degradation in storage. We measure it rather than assume it.
04
Residual solvent screening
Process residues
Screening for acetonitrile and TFA carried over from synthesis and purification, reported against ICH Q3C limits for laboratory materials.
05
Appearance and reconstitution check
Physical conformance
Visual inspection of the lyophilized cake and confirmation that the material returns a clear solution in laboratory solvent at the reference concentration used for assay.
Quality controls
Independent analysis
Release testing is performed by a third party analytical laboratory. We do not certify our own material, and we publish the name of the laboratory on every certificate.
Lot level traceability
Every vial carries a lot number. Where analytical data exists for that lot it is retrievable without an account, so a purchaser can review it before ordering. Where it does not, the product page states that plainly rather than staying silent.
Cold chain
Material is lyophilized under vacuum, sealed, and stored at -20 °C. Outbound shipments travel in insulated packaging with a cold pack.
Retention samples
A retention sample of each lot is held so that any question raised later can be answered against the material actually shipped.
Record retention
Analytical records, lot histories, and purchaser attestations are retained for seven years.
Safety data sheets
A safety data sheet is available for every catalog item, covering hazard identification, handling, personal protective equipment, spill response, and disposal. Institutional purchasers typically require the SDS on file before a purchase order is raised. Request it and we will send it the same business day.