Purity

98.7%

Vial

3 mL × 10

Lot

GPB-4488

Repair · CAS 77591-33-4

TB-500

Thymosin β4 Fragment

The pre-filled pen range Ask GpharmaBio for a vial quote

UK & Europe Next-Day Delivery — Order before 1pm.Worldwide Delivery — Estimated delivery within 5–10 days.

The certificate for lot GPB-4488 is published in full further down this page.

Supplied in sealed boxes of 10 vials, one lot to a box. Single vials are not broken out of a box.

Primary sequence

AcSerAspLysProAspMetAlaGluIleGluLysPheAspLysSerLys… (43)

Physical data

Molecular formula: C₂₁₂H₃₅₀N₅₆O₇₈S
Molecular weight: 4963.51 g/mol
CAS number: 77591-33-4
Appearance: White lyophilised powder
Solubility: Soluble in sterile water to 10 mg/mL
Storage: Lyophilised: −20 °C, desiccated

Certificate of analysis

Lot GPB-4488, in full.

Published here. Nothing to request, nothing behind a form.

GpharmaBio

RESEARCH PEPTIDE LAB

part of GBAGROUP

CERTIFICATE OF ANALYSIS

GPB-4488

PRODUCT: TB-500
FILL: 5 mg / 3 mL vial · box of 10
SYNTHESISED: 17 Mar 2026
RELEASED: 25 Mar 2026
RETEST: Mar 2028

IDENTITY

CAS NUMBER: 77591-33-4
MOLECULAR FORMULA: C₂₁₂H₃₅₀N₅₆O₇₈S
MOLECULAR WEIGHT: 4963.51 g/mol

RP-HPLC, C18 2.7 µm 150 × 4.6 mm · 0.1% TFA / MeCN, 5–65% over 30 min · 1.0 mL/min · DAD 214 nm

Analytical purity scaleRP-HPLC area @ 214 nm

98.7%

Measured, this lot

High purity

Release specification ≥ 98.0%

98.7%

9596979899100

Red rule marks the house release limit. This lot sits 0.7 points above it. Area percent cannot see anything without a chromophore at 214 nm, which is why moisture, counterion and net peptide content are reported separately below.

TEST	RESULT, THIS LOT
RP-HPLC purity	98.7% area @ 214 nm
Identity (ESI-MS)	4963.8 observed, 4963.4 expected
Met sulfoxide	0.31%
Net peptide content	79.8%
Water (Karl Fischer)	4.6%
Bacterial endotoxin	< 0.25 EU/mg (LAL)

Security code

TPVP-YTQ6

Verified by AUTHENTIX®

This is the sheet for the lot on the shelf — not a representative document. If the lot number moves on before you order, the page moves with it.

Handling

Protect from oxygen — do not leave the vial uncapped after piercing.
Reconstitute slowly down the vial wall; do not shake.
Stable ~14 days at 2–8 °C once in solution.

For laboratory research use only. Not for human or veterinary consumption, diagnostic or therapeutic use.

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