Public COA audit

TB-500 · TB-4

Audited July 28, 2026

Mostly consistent, with concerns

Several fields check out, but we found issues worth reviewing before you rely on this document.

Legitimacy
88
Confidence
87%
Panels
2/7
Purity (printed)
99.98%

Document details

Fields extracted from the certificate — not order or payment data.

Identity method
LC-MS with UV detection
Sample date
2025-03-20
Issue date
2025-03-26

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).

    TB-500 (TB-4)

  • Purity

    Tested · passed · core

    Reported purity percentage for the analyte.

    99.98%

  • 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

    99.98% purity by LC-MS exceeds specification of >98%, which is normal for research-grade peptides

  • Identity confirmed

    Compound identified as TB-500 (TB-4) with CAS 77591-33-4, molecular formula C212H350N56O78S, molecular weight 4963.49 g/mol. PubChem CID 62707662 referenced.

  • Batch/Lot number missing

    The Batch/Lot # field is present but blank, which reduces traceability

  • Dates are reasonable

    Sample received 2025-03-20, analysis conducted 2025-03-26 (6-day turnaround)

  • Lab identification present

    BioRegen lab with analyst Dr. Roberto Marin, contact email, verification URL, and QR code provided

  • Limited testing scope

    Only identity and purity panels performed. No heavy metals, microbial, endotoxin, sterility, or residual solvent testing shown. This is common for basic research peptide COAs but limits safety assurance.

  • Professional presentation

    Document includes chromatograms, mass spectra, security key, and QR code for verification

Timing & next steps

Practical follow-ups based on document age and gaps.

  • coa age

    This COA was issued over a year ago (489 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.