Public COA audit
TB-500 · Thymosin beta4
Audited July 28, 2026
Several fields check out, but we found issues worth reviewing before you rely on this document.
- Legitimacy
- 72
- Confidence
- 85%
- Panels
- 2/7
- Purity (printed)
- 99%
Document details
Fields extracted from the certificate — not order or payment data.
- Batch / lot
- SW-A014-05
- Identity method
- Mass Spectrometry and UV
- Issue date
- 2022-12-23
7-panel checklist
Had data + good, had data + bad, reported without pass/fail, or missing. Missing lowers thoroughness — you decide whether that panel matters; PeptIQ’s score still factors coverage.
2 of 7 present · 2 passed · 0 failed · 0 reported · 5 missing
Missing is a thoroughness gap — not automatically bad. PeptIQ’s legitimacy score still weighs panel coverage; you can down-weight panels that don’t matter for your use case.
Identity
Tested · passed · core
Compound identity confirmed (e.g. HPLC, mass spec).
5017.60 g (expected 5017.51 g)
Purity
Tested · passed · core
Reported purity percentage for the analyte.
99.0%
Heavy metals
Not on this COA
Lead, arsenic, cadmium, mercury, or similar limits.
No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.
Microbial
Not on this COA
Bioburden / microbial limits testing.
No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.
Endotoxin
Not on this COA · core
LAL or chromogenic endotoxin assay.
No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.
Sterility
Not on this COA
Sterility testing where applicable.
No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.
Residual solvent / water
Not on this COA
Residual solvents or water content limits.
No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.
How to read this
Had data · good
Panel present with a pass (or clear acceptance).
Had data · bad
Panel present with a fail — a concrete quality signal.
Had data · unclear
Value reported without an explicit pass/fail mark.
Missing
Not on this certificate. Lowers thoroughness; you decide if that panel matters for your use case. PeptIQ’s score still factors coverage.
Findings
Evidence-linked observations from this audit.
High purity confirmed
99.0% purity by UV detection with clear chromatogram showing main peak at 12.55 min representing 99.0% area. This is normal for research-grade peptides.
Mass spectrometry confirmation
Molecular weight confirmed: measured 5017.60 g vs expected 5017.51 g, excellent agreement within 0.02%.
Batch number present
Lot number SW-A014-05 clearly stated.
Analysis date vs issue date discrepancy
Analysis date shown as 2022-12-22 but document signed/issued 2022-12-23. Minor one-day difference is acceptable but worth noting.
Lab verification limited
MZ Biolabs contact information provided but no independent verification URL for the COA itself. PubChem link is for compound reference, not COA verification.
Limited testing scope
Only identity and purity panels performed. No heavy metals, microbial, endotoxin, sterility, or residual solvent testing. This is common for basic research-grade peptide COAs but limits quality assurance.
Professional presentation
Document includes chromatogram, peak list, analyst signature, and clear formatting consistent with legitimate analytical lab reports.
Watermark present
Large 'SW' watermark overlay suggests this may be a client copy or sample document, not the original lab-issued COA.
Timing & next steps
Practical follow-ups based on document age and gaps.
coa age
This COA was issued over a year ago (1313 days) — consider whether a retest is warranted for this batch.
PeptIQ COA reports analyze document content and publicly verifiable lab signals. They are educational and not a guarantee of product quality, legality, or safety. Always consult a qualified professional before making health decisions. We never publish purchase prices, shipping details, or uploader identity.