Semax reconstitution calculator
Solution arithmetic for lyophilized Semax: concentration from vial mass and solvent volume, the solvent volume for a target concentration, and aliquot volumes. The molecular weight (813.9 Da) is filled in so results also show millimolar values. You enter every amount; nothing is suggested.
Sample mass and solvent volume to concentration.
Result
Enter your numbers and choose Calculate.
Formulas
- Concentration: mg/mL = mass (mg) ÷ volume (mL). µg/mL = mg/mL × 1000.
- Solvent volume: volume (mL) = mass (mg) ÷ target concentration (mg/mL).
- Aliquot volume: volume (mL) = mass wanted (mg) ÷ solution concentration (mg/mL). µL = mL × 1000.
- Molar: mM = mg/mL ÷ molecular weight (g/mol) × 1000.
- Units: 1 mg = 1000 µg. 1 mL = 1000 µL.
Worked arithmetic for Semax
Each cell is simply mass ÷ volume, with the molar value from the listed molecular weight (813.9 Da). Rows use round example masses. The table illustrates the formula; it is not a recommendation for any amount or volume.
| Vial mass | 1 mL solvent | 2 mL solvent | 3 mL solvent | 5 mL solvent |
|---|---|---|---|---|
| 5 mg | 5 mg/mL 5,000 µg/mL · 6.14 mM | 2.5 mg/mL 2,500 µg/mL · 3.07 mM | 1.67 mg/mL 1,670 µg/mL · 2.05 mM | 1 mg/mL 1,000 µg/mL · 1.23 mM |
| 10 mg | 10 mg/mL 10,000 µg/mL · 12.3 mM | 5 mg/mL 5,000 µg/mL · 6.14 mM | 3.33 mg/mL 3,330 µg/mL · 4.1 mM | 2 mg/mL 2,000 µg/mL · 2.46 mM |
Formulas used
- Concentration: mg/mL = vial mass (mg) ÷ solvent volume (mL).
- Molar: mM = mg/mL ÷ 813.9 g/mol × 1000.
- Aliquot volume: µL = mass wanted (µg) ÷ concentration (µg/mL) × 1000.
Stated vial mass is gross lyophilized powder. Net peptide content can be lower because of counter-ions and water; the purity and net peptide content calculator corrects a nominal concentration if you have those values.
Semax at a glance
| Molecular weight | 813.9 Da |
|---|---|
| Molecular formula | C37H51N9O10S |
| Storage (as listed) | -20°C lyophilized; 2–8°C reconstituted |
Semax product page · Semax research overview · Reconstitution guide · Reconstitution math explained · Shipping & storage on arrival · Glossary
Semax calculator FAQ
How is Semax concentration calculated after reconstitution?
Divide the vial mass by the solvent volume. For example, 5 mg in 2 mL gives 2.5 mg/mL (2,500 µg/mL). This is unit arithmetic only, not a recommendation for any amount.
How do I convert Semax mg/mL to millimolar?
Divide mg/mL by the molecular weight (813.9 Da) and multiply by 1000. 2.5 mg/mL ÷ 813.9 g/mol × 1000 = 3.07 mM.
Why can the real concentration be lower than the calculated value?
The stated vial mass is gross lyophilized powder. Counter-ions (such as acetate or TFA) and residual water mean net peptide content is lower than gross mass, so the true peptide concentration can be lower. The purity and net peptide content calculator applies that correction if you have the values.
Is this calculator for human or veterinary use?
No. Semax is sold for laboratory research use only. This page performs solution arithmetic on the numbers you enter and gives no dosing or usage guidance.
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Background reading
The arithmetic on this page is explained, with its assumptions, in these guides.
Research use only. For laboratory research use only. Not for human or veterinary use. This page performs unit arithmetic on the numbers you enter and gives no recommendations about amounts or dosing. Check results against your own protocol and records.
