Out of stock
Made in the USA
USA Med Peptides · Physician-Approved Line
TB-500
Physician-Grade Peptide · Lyophilized
$45.00
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Per vial. Volume pricing available for qualified institutions.
A synthetic peptide based on a fragment of thymosin beta-4. Supplied as a lyophilized powder in a sealed vial.
Strength
Purchase Option
Same-day dispatch on orders before 2pm ET
Certificate of analysis included with every order
Made in the USA
Supplied exclusively to licensed medical providers for professional use. Not sold to consumers. Not FDA approved.
Main-Peak Purity
99.097%
Batch / Lot
20457
Verification
HPLC / LC-MS
Classification
Licensed Medical Providers Only
Overview
A synthetic peptide based on a fragment of thymosin beta-4. Supplied as a lyophilized powder in a sealed vial.
Supplied as a sterile-filtered, lyophilized powder in a sealed glass vial. Reconstitution is performed by the researcher. A lot-specific certificate of analysis is enclosed with every order.
This description is provided for general reference only. It is not a claim of any property, effect, benefit, or suitability for any particular use.
Specifications
Form
Lyophilized powder
CAS Number
77591-33-4
Purity (lot 20457)
99.097%
Strengths
5 mg, 10 mg
Verification
HPLC / LC-MS
Storage
−20°C desiccated
Certificate of Analysis
Third-party lab tested · Freedom Diagnostics
99.097%Purity (HPLC-UV)
20457Batch / Lot
Jan 28, 2026Test date
LC-MSIdentity confirmed
ClearedEndotoxin · USP <85>
Every lot is characterised independently before release, this one on Jan 28, 2026. The signed certificate is shown in full below and ships inside every order.
Sample Summary
| Product | TB-500 · 5mg tested |
|---|---|
| CAS Number | 77591-33-4 |
| Batch / Lot | 20457 |
| Accession # | 2601270210 |
| Test date | Jan 28, 2026 |
| Appearance | White Lyophilized Powder |
| Identity | TB-500 · confirmed via LC-MS |
Purity Analysis
HPLC with UV detection coupled with mass spectrometry (LC-MS).
| Purity (HPLC-UV) | 99.097% |
|---|---|
| Identity (LC-MS) | TB-500 |
| Net peptide content | 5.85 mg |
| Test method | HPLC-UV + LC-MS |
What this test measures. High-performance liquid chromatography with UV detection separates the peptide from related impurities and quantifies each fraction. Mass spectrometry confirms molecular identity by measuring the exact mass-to-charge ratio.
Endotoxin Analysis
Limulus Amebocyte Lysate (LAL) assay, run in duplicate in accordance with USP <85>.
| Result | ✓ Cleared (below threshold) |
|---|---|
| Replicate 1 | Pass |
| Replicate 2 | Pass |
| Standard | USP <85> Bacterial Endotoxins Test |
What this test measures. The LAL assay detects bacterial endotoxin. Both replicates must fall below the USP <85> reporting threshold to clear. For research-grade material handling only.
Full Certificate
FD
Certificate of Origin
US
Test History
| Lot | Tested | Method | Purity | Status |
|---|---|---|---|---|
| 20457 | Jan 28, 2026 | HPLC / LC-MS | 99.097% | Released |
Related compounds
Frequently asked questions
As a sterile-filtered, lyophilized powder in a sealed glass vial. Reconstitution is performed by the researcher.
Yes. A lot-specific certificate confirming identity and purity ships inside every order.
Keep the lyophilized vial desiccated at minus 20 degrees C for long-term storage. It is stable at room temperature during transit.
Products are supplied exclusively to licensed medical providers and their authorized staff. Any professional application is made under the provider’s own license and clinical judgment.