T-012–4 days
Purity
Reverse-phase HPLC with UV detection. Area-percent purity of the main peak, plus every impurity above 0.1%.
RP-HPLCUV 220 nmC18 gradient
Arc Analytical has been acquired by an external party and is preparing a re-launch under new ownership.
Purity, identity and content testing for research compounds. Each sample gets a report number, a cryptographic fingerprint and a public record you can check in seconds.
Every method is written down with instrument, column, wavelength and acceptance criteria. No black boxes. You see the same parameters we use.
Reverse-phase HPLC with UV detection. Area-percent purity of the main peak, plus every impurity above 0.1%.
LC-MS/MS confirms the compound is what the label says. Observed mass versus theoretical, with fragmentation where needed.
How many milligrams are actually in the vial, measured against a reference standard rather than assumed from the label.
Kinetic chromogenic LAL test for bacterial endotoxins, reported in endotoxin units per vial and per milligram.
Direct inoculation in fluid thioglycollate and soybean-casein digest media, incubated 14 days.
Karl Fischer titration for residual water in lyophilised product, ICP-MS for lead, arsenic, cadmium and mercury.
The report number is assigned before the sample is opened. The PDF is fingerprinted before it leaves the lab. Nothing in between can be edited without the fingerprint changing.
The sample arrives sealed. It is photographed, weighed and logged. A report number is issued on the spot and the sample is stored at −20 °C.
→ ARC-2026-0000 assignedReconstitution in the documented diluent, gravimetric dilution to the working concentration, reference standard prepared in parallel.
→ traceable balance, loggedThe run goes on the instrument with system-suitability standards before and after. If suitability fails, the run is repeated, never patched.
→ raw data archivedThe signed PDF is hashed with SHA-256. Report number, result and fingerprint are published to this site. Anyone holding the PDF can check it matches.
→ verifiable belowPrinted on the first page of every report.
Client names are only shown when the client asked for it. Everything else on a report is public.
Only laboratory staff. Accounts are created in Supabase → Authentication.
Fill in the report, drop the signed PDF so its fingerprint is computed, and publish. The record appears in the table and becomes verifiable immediately.
One spreadsheet with a row per report, plus the PDFs. Rows are checked first; nothing is published until you press the button. Download the spreadsheet template.
An independent analytical laboratory. We test; we do not sell. No vendor owns a share, no vendor gets a discount for volume, and no report is edited after it is signed.
Purity by RP-HPLC, identity by LC-MS, content per vial, bacterial endotoxin (LAL), sterility (USP <71>), water content (Karl Fischer) and heavy metals (ICP-MS) for research peptides and related compounds.
Enter the report number above, or drop the PDF. Its SHA-256 fingerprint is computed in your browser and matched against our public record. An altered or forged PDF does not match. Older revisions and withdrawn reports are shown as such, never as "not found".
No. We test samples submitted by clients and publish the results. We have no commercial relationship with any vendor.
Typically 5–7 business days from receipt. Sterility testing needs 14 days of incubation.
Only when the client asks for it. By default a report is listed as anonymous; the sample, result and fingerprint are always public.
Email us for a submission form and shipping address. One sealed vial per test panel. Report numbers are issued at intake, before the vial is opened.