TB-500, lyophilised powder in a sealed glass vial

TB-500 — Nexus Peptides product photograph

Certificate of Analysis

Order 100016164 · Batch TB5-0426B

Analiza Białek sp. z o.o.
Wrocław, Poland
Completed 2026-07-23

Substance	TB-500
Form	White powder in a glass vial
Method of taking a sample	Sample provided by customer
Receive date	2026-07-13
Analysis period	2026-07-17 → 2026-07-23
Column	BioBasic 8, Thermo Scientific
Gradient	H₂O / ACN, both + 0.1 % TFA
Content	10.92 mg (± 0.05 mg)
Purity	99 %
Verification code	Z1WA54R9
Lab technician	mgr Arkadiusz Zając

Chromatogram and sample photograph on page 2Open the report (PDF)

Cytoprotection research

TB-500

Name: TB-500
Brand: Nexus Peptides
Availability: InStock

Ac-LKKTETQ-OH, a thymosin β4 fragment.

TB5-0426B

99 %

$ 224.99

$ 22.50 per vial

Unit is ten vials. Not sold singly and not split. Filling in tens is what puts the per-vial figure where it is — a pricing structure, not a promotion, so it does not expire.

1–10 days — ships from the US or EU warehouse, whichever serves your region. Tracking on dispatch.
Store at 2–8 °C, protected from light.
Tested by Analiza Białek, Wrocław. Every published certificate
Research use only. Not a medicine. Not for human or veterinary use. No protocol, quantity or method of administration is supplied.

Identity & specification

What the vial contains

Chemical identity is stated against a CAS number rather than a description, and only where the value is verified. The molecular weight is the free base — acetate or TFA salt forms will not match it, and will not match the laboratory’s figures either.

Compound: TB-500
Physical form: Lyophilised powder
CAS number: 885340-08-9
Container: Sealed glass vial, crimped
Molecular formula: C38H68N10O14
Unit size: 10 vials — not sold singly
Molecular weight: 889.0 (free base)
Strengths available: 2 mg / 5 mg / 10 mg
Purity specification: ≥ 99 % by HPLC
Storage: 2–8 °C, protected from light
Test method: RP-HPLC, H₂O / ACN + 0.1 % TFA
Documentation: COA per batch, published

Research context

Ac-LKKTETQ-OH, a thymosin β4 fragment.

Supplied as lyophilised powder in sealed glass vials, in units of ten vials. Distinct from full-length thymosin β4 (CAS 77591-33-4), which is a different compound.

Research use only. Not a medicine, not for human or veterinary use, not for food use, and not offered for the diagnosis, treatment, cure or prevention of any condition. No protocol, quantity or method of administration is supplied with this product. Determining suitability for a given experiment is the researcher’s responsibility.

Handling and storage

Store sealed vials at 2–8 °C, protected from light.
Allow vials to reach room temperature before opening to limit condensation.
Preserved diluent for laboratory preparation is stocked separately — see laboratory supplies.
Bulk batches do not always carry a lot number on the individual vial. The batch number is on the certificate, not necessarily on the glass.

Batch & certificate

The batch you are buying, and its report

No batch is listed before its certificate exists. This one carries the laboratory’s own order number and verification code, so it can be confirmed with Analiza Białek rather than with us.

Certificate of Analysis

Order 100016164 · Batch TB5-0426B

Analiza Białek sp. z o.o.
Wrocław, Poland
Completed 2026-07-23

Substance	TB-500
Form	White powder in a glass vial
Method of taking a sample	Sample provided by customer
Receive date	2026-07-13
Analysis period	2026-07-17 → 2026-07-23
Column	BioBasic 8, Thermo Scientific
Gradient	H₂O / ACN, both + 0.1 % TFA
Content	10.92 mg (± 0.05 mg)
Purity	99 %
Verification code	Z1WA54R9
Lab technician	mgr Arkadiusz Zając

Chromatogram and sample photograph on page 2Open the report (PDF)

Check it with the laboratory, not with us

The report is published whole — sample photograph, chromatogram, gradient table and technician included — not cropped down to a purity figure. The order number and verification code are printed on the report itself and are what make it checkable.

Laboratory: Analiza Białek sp. z o.o.
Address: ul. Duńska 9, 54-427 Wrocław
KRS / NIP / REGON: 0000966168 / 8992922970 / 521751875

The report prints the verification code under the heading “Password”. It is the same value.

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