What the TB-500 (thymosin BETA-4) record shows

Evidence through 2026-05-09

TitrateLab tracks 9 published TB-500 (thymosin BETA-4) certificate-of-analysis records through 2026-05-09. Across 9 records with a usable peptide-purity result, the median reported purity is 99.3%. Across 5 records with measured-versus-label dose data, 40% are within 10% of the labeled quantity. This is a public convenience sample, not a randomized market survey; one result describes one submitted sample and does not verify other batches.

Published records9
Reported purity99.3% median · 9 results
Dose accuracy40% within ±10% · 5 results
EndotoxinNot reported
Evidence dates2025-04-01 to 2026-05-09
Limits and missing evidence
  • No classifiable endotoxin results were recorded.
  • Coverage depends on reports that were published and available to ingest.
Assay metrics

TB-500 (thymosin BETA-4) lab-testing metrics

9
Certificates
99.3%
Median tested purity
78%
Certs ≥ 99% purity
0
Zero-purity certs
1
Testing labs
7
Vendors
Mean purity99.1% Below 90% purity0% Mean dose vs label+8.4% Underfilled0% Within 10% of label dose40% Overdosed ≥ +7%80% Underdosed ≤ −7%0%

COAs per testing lab

Every lab testing TB-500 (thymosin BETA-4) in the corpus.

Freedom Diagnostics 9 99.3% med

Tested-purity distribution

Bins below 90% tested purity (0% of certs).

TB-500 (thymosin BETA-4) tested-purity distribution
Purity rangeCertificates
0–50%0
50–70%0
70–80%0
80–85%0
85–90%0
90–91%0
91–92%0
92–93%0
93–94%0
94–95%0
95–96%0
96–97%0
97–98%2
98–99%0
99–100%7

COAs over time

TB-500 (thymosin BETA-4) certificates published per month.

TB-500 (thymosin BETA-4) certificates per month
MonthCertificates
2025-041
2025-051
2026-021
2026-031
2026-044
2026-051

Most-tested vendors

Vendors by TB-500 (thymosin BETA-4) certificate count.

See who tests most — unlock the vendor names with Pro.

Verified Vendor A 🔒 2
Verified Vendor B 🔒 1
Verified Vendor C 🔒 1
Verified Vendor D 🔒 1
Verified Vendor E 🔒 1
Verified Vendor F 🔒 1
Verified Vendor G 🔒 1
Verified Vendor H 🔒 1

Published TB-500 (thymosin BETA-4) certificates of analysis

9 records. Zero guesswork.

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Illustrative structure only. No record-level values are present in this preview.

More COA results by compound