Peptid-Rekonstitutionsrechner

How to use the peptide calculator

1. Pick your syringe. Insulin syringes are graduated in units, not millilitres. A U-100 1 ml syringe holds 100 units, so one unit equals 0.01 ml.
2. Enter the peptide amount. This is the total mass of lyophilised powder in the vial, printed on the label — for example 5 mg or 10 mg.
3. Enter the bacteriostatic water volume. The volume you reconstitute with sets the concentration. Less water gives a higher concentration and a smaller draw; more water gives a lower concentration and a larger, easier-to-measure draw.
4. Zielmenge eingeben. Der Rechner rechnet sie in Spritzeneinheiten um und zeigt die Konzentration in mg/ml sowie die Anzahl Aliquote dieser Größe im Fläschchen.

The reconstitution formula

Every reconstitution calculation reduces to two steps. First the concentration, then the volume:

• concentration (mg/ml) = peptide amount (mg) ÷ bacteriostatic water (ml)
• aufzuziehendes Volumen (ml) = Zielmenge (mg) ÷ Konzentration (mg/ml)
• syringe units = volume to draw (ml) × 100

Beispiel: Ein 5-mg-Fläschchen, rekonstituiert mit 2 ml bakteriostatischem Wasser, ergibt 2,5 mg/ml. Eine Zielmenge von 250 mcg (0,25 mg) ist 0,25 ÷ 2,5 = 0,1 ml, also 10 Einheiten auf einer U-100-Insulinspritze.

Handling and storage notes

Add the bacteriostatic water slowly down the inside wall of the vial rather than directly onto the powder, and swirl gently instead of shaking — peptides are fragile and vigorous agitation can degrade them. Store lyophilised vials at room temperature away from light; refrigerate reconstituted solutions at 2–8°C and use them within about 30 days. Refer to the batch Certificate of Analysis for compound-specific stability data.

This calculator is provided as a laboratory reference tool. All products and calculations are for in-vitro research use only and are not intended for human or animal consumption.

Browse our research peptide catalog, or read the FAQ for storage, purity and Certificate of Analysis details.