All TB-500 Certificate of Analysis results— 1256 COAs
TitrateLab · Certificate of Analysis

TB-500 99.9% Purity — Qingdao Sigma ChemicalCertificate of Analysis · Independent third-party lab result

Tested purity 99.9% High purity · 99.902%
Dose vs label +10.1% Over the labeled dose
Evidence Artifact captured Trust: medium
AI summary Third-party lab

Janoshik tested this TB-500 batch at 99.902% purity via HPLC. The tested quantity of 8.81mg showed a significant deviation of +10.1% from the 8mg label. Endotoxin status is unknown, but the test is recent (under 3 months). Customers can cross-check on the lab's public verification URL.

Watch out for
  • no endotoxin test
  • quantity deviation (+10.1%)
  • batch ID unknown
Test date
2026-03-25
Testing lab
Janoshik
Batch / lot
Quantity
8.81mg
label 8mg · tested 8.81mg
Endotoxins
Assay method
HPLC
Label dose
8mg
Context

How this result compares

This TB-500 certificate's tested purity of 99.90% ranks higher than 97% of the 1248 TB-500 certificates with a purity result we have catalogued (median 99.39%).

Tested 2026-03-25 by Janoshik via HPLC. This test is newer than 67% of our catalogued TB-500 certificates.

Qingdao Sigma Chemical has 510 certificates in our corpus, including 9 for TB-500 at a median tested purity of 99.40%.

Manufacturer
Qingdao Sigma Chemical
View vendor profile
Certificate

Test report image

Certificate scan
Certificate scan as published.
Source

Janoshik (public)

Artifact captured

We have the certificate image (SHA-256 hash captured) — you can verify it loads from the upstream lab and matches the artifact shown here.

Verify on the upstream lab
Method
HPLC
Dose
8mg
Catalogued
2026-04-24
Artifact hash
9fdb2cf5876e3b23…
OCR text Raw extracted text

Extracted via OCR. Names, emails, phone numbers, and street addresses are auto-redacted before display.

{"peptide": "TB-500", "dose": "8mg", "purity_pct": 99.902, "purity_label": "99.902%", "method": "HPLC", "test_date": "2026-03-25", "client": "Telegram @tracyfromqsc", "notes": "Unretained peak eluting at column void volume was not included in purity assessment. Sample was tested twice.", "label_qty": "8mg", "tested_qty": "8.81mg", "quantity_deviation_pct": 10.125, "is_blend": false, "components_json": "", "ocr_confidence": 0.95}
Related

Other TB-500 certificates

All TB-500 results & stats
This certificate is part of TitrateLab's community-trust corpus. See more from Qingdao Sigma Chemical or learn how trust scores are computed on the methodology page. New to lab reports? How to read a COA →