Is a Certificate of Analysis available for TB-500?

Yes. Batches are independently verified by reverse-phase HPLC. The Certificate of Analysis is batch-matched to the vial label and published in the public COA library at alphex.co.uk/pages/coa, where you can read it before you order.

How should it be stored on arrival?

Lyophilised peptides ship vacuum-sealed. Refrigerate at 2 to 8 C for short-term storage and freeze at minus 20 C for long-term storage. Keep light-sensitive compounds in the original vial.

What is it supplied for?

Supplied exclusively for laboratory and in-vitro research purposes by qualified researchers. Not authorised for human or veterinary use.

Thymosin Fragment

TB-500

Q: How is it shipped and how quickly?

Order by 2pm Monday to Friday for same-day dispatch from UK domestic stock. Sent with Royal Mail Tracked 24, which aims for the next working day, in vacuum-sealed, discreet packaging. 3.99 GBP under 60 GBP, free over 60 GBP after any discount.

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Certificate pending

Testing pending

We do not publish a purity figure for a batch we have not had tested. The certificate goes into the library the moment this compound is back in stock and verified.

Browse the certificate library

Every certificate Alphex holds is published in full, including a batch we rejected. All testing is carried out by Vanguard Laboratory, Olympia WA.

Certificate of Analysis

Every batch is independently verified by reverse-phase HPLC to 99+% purity by Vanguard Laboratory. The certificate is batch-matched to the vial label and published in our COA library, so you can read it before you order rather than asking for it.

Vanguard is accredited to ISO/IEC 17025:2017 by A2LA under certificate scope 6377.01. The chromatographic purity result is not represented as an accredited-scope test.

Shipping & delivery

Order by 2pm Mon-Fri for same-day dispatch. Sent with Royal Mail Tracked 24, which aims for the next working day. Vacuum-sealed, discreet packaging. £3.99 under £60, free over £60 after any discount.

Free delivery protection is included on every order. If your parcel is lost in transit or a vial arrives damaged, we replace it at no cost. See shipping and delivery.

Storage & handling

Lyophilised peptides ship vacuum-sealed. Refrigerate (2-8°C) on arrival for short-term storage, freeze (-20°C) for long-term.

Research use only

Supplied exclusively for laboratory and research purposes. Not authorised for human or veterinary use.

TB-500 - Research Peptide

For research purposes only. This product is supplied exclusively for scientific laboratory research and analytical applications. It is not intended for human or animal use, and must not be misused in any way that contravenes regulations or applicable laws.

Product Overview TB-500 is a synthetic fraction of the protein thymosin beta-4, specifically associated with the actin-sequestering domain. It is a research reagent used to investigate cytoskeletal motility, cellular migration, and wound healing models in a laboratory environment.

Technical Specifications:

Chemical Name: Thymosin Beta-4 (Synthetic Fragment)
Molecular Formula: C38H68N10O14 (Active Fraction)
Molecular Weight: 4963.5 g/mol (Full Sequence) / ~800-900 g/mol (Fragment)
CAS Number: 77591-33-4
Sequence: Ac-Ser-Asp-Lys-Pro-Asp-Met-Ala-Glu-Ile-Glu-Lys-Phe... (N-terminal)
Purity: ≥99.0% (HPLC Verified)
Appearance: White lyophilized powder.

Storage & Handling: Store at -20°C. This peptide is water-soluble and stable in lyophilized form. Once reconstituted, keep refrigerated at 4°C and use within standard laboratory timeframes.

TB-500 specification

Compound class	Synthetic heptapeptide, thymosin beta-4 fragment
Sequence	Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (Ac-LKKTETQ), thymosin beta-4 fragment 17-23
Molecular formula	C38H68N10O14
Molecular weight	889.0 g/mol
CAS number	885340-08-9
Also known as	TB500, Thymosin beta-4 (17-23) acetate
Form	Lyophilised powder, vacuum-sealed glass vial
Purity and identity	99+% by RP-HPLC (220 nm)
Available sizes	10mg
Storage	Sealed vial: -20 C long term, 2-8 C short term. Protect from light and moisture.
Documentation	Batch-matched Certificate of Analysis with the HPLC chromatogram, the measured purity and the issuing laboratory named. Published in the public COA library, searchable by the batch code printed on the vial label.
Origin and dispatch	UK domestic stock. Same-day dispatch before 2pm Mon-Fri, sent with Royal Mail Tracked 24.
Intended use	Laboratory and in-vitro research only. Not authorised for human or veterinary use.

Values are typical for the compound. The Certificate of Analysis for the shipped batch is the authoritative record for purity, identity and net content.