TB-500 Reconstitution Calculator
A synthetic fragment of Thymosin Beta-4 frequently studied alongside BPC-157 in repair-related research. This page works out concentration, volume per measured amount, syringe units and preparations per vial for a reconstituted TB-500 preparation. Everything runs in your browser; plan entries stay in this browser, with optional device-local saving and calendar export.
Also referenced as: Thymosin Beta-4
02 / Calculated draw
Arithmetic from your entries. Confirm the product, concentration and syringe with your pharmacist or clinician before administration.
- Concentration
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- Amount per administration
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- Volume per administration
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- U-100 syringe marking
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- Whole administrations per vial
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- Remainder per vial
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Enter the vial, water and administration amounts to calculate.
Syringe capacity
Whole administrations exclude dead space, handling losses and expiry. A calculated quantity is not a guarantee of usable supply. No rounding to a nearby syringe mark is performed.
Protocol schedule
Schedule an existing prescribed or approved protocol. This tool cannot determine how often you can safely take a peptide. Frequency, dose, reconstitution, storage and discard instructions must come from the product label and your clinician or pharmacist.
04 / Your calendar
Complete your calculation and timing to build a schedule.
Calculations stay in this browser. Saving is optional and device-local. Calendar export creates a file; import it into your calendar and configure reminders there. PeptiDex does not send notifications.
| Date & time | Amount | Draw | Vial |
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Measurement reference: FDA guidance on concentration, syringe size and mg/mL/unit conversion errors.
A separate worked example, step by step
This separate arithmetic example uses a 5 mg vial, 2 mL of bacteriostatic water, and a 250 mcg target amount. They are not a property of TB-500 and not an amount anyone should draw — these figures only illustrate the arithmetic.
- Concentration. 5 mg ÷ 2 mL = 2.5 mg/mL (2,500 mcg/mL).
- Per syringe unit. A U-100 syringe divides 1 mL into 100 units, so one unit holds 2,500 mcg ÷ 100 = 25 mcg.
- Volume for the 250 mcg target. 250 mcg ÷ 2,500 mcg/mL = 0.1 mL, or 10 units on that syringe.
- Preparations per vial. 5,000 mcg ÷ 250 mcg = 20 preparations.
Arithmetic on a laboratory preparation, shown as a unit-conversion reference. Not medical advice, not a dosing recommendation, not an instruction for human use. The full derivation, and why the diluent volume is a choice rather than a constant, is on the main reconstitution calculator.
Molecular weight recorded for TB-500
~4921 Da (full-length thymosin beta-4); ~889 Da for the Ac-LKKTETQ fragment form
No single molar equivalent is derived here: the TB-500 entry does not record one unambiguous molecular weight, and choosing between the figures it does record would be a guess. Convert against whichever mass matches the material on your Certificate of Analysis.
Reconstitution recorded for TB-500
Lyophilized; reconstituted with bacteriostatic water, swirled not shaken; store reconstituted at 2-8 C protected from light
Quoted from the TB-500 entry. Amounts reported in the research literature for this compound are documented on that entry, under the disclaimer they belong with — they are not reproduced next to a calculator. Read the full TB-500 entry.
Handling questions for TB-500
How is TB-500 reconstituted and stored?
It is supplied lyophilized and reconstituted with bacteriostatic water, added gently and swirled rather than shaken. Reconstituted solution is stored refrigerated at 2-8 C and protected from light, while lyophilized powder is more stable and can be frozen for longer-term storage.
Answers are published on the TB-500 entry. Educational summaries of research-literature context, not medical advice.
Continue exploring
- Full TB-500 entry — Actin-binding peptide fragment
- Reconstitution calculator — the maths in full, with a second worked example
- Storage & Handling guide
- Bacteriostatic water — what it is and how it differs from sterile water
- Compare TB-500 with another library entry