How much bac water for 10 mg PT-141?
Concentration and U-100 syringe unit chart for a 10 mg vial. Measurement arithmetic for preparing research solutions. For laboratory research use only.
Most labs add 2 mL of bacteriostatic water to a 10 mg PT-141 vial, giving 5 mg/mL, so 10 units on a U-100 insulin syringe (0.1 mL) holds 500 mcg. Alternatives: 1 mL gives 10 mg/mL; 1.5 mL gives 6.67 mg/mL; 2.5 mL gives 4 mg/mL. Less water gives a stronger solution and fewer units per draw; more water gives finer resolution per unit.
10 mg PT-141 reconstitution chart
Concentration = 10 mg divided by the mL of water added. On a U-100 insulin syringe, 100 units = 1 mL, so 10 units = 0.1 mL. Units for a given amount = amount / concentration x 100.
| Bac water added | Concentration | In 10 units (0.1 mL) | Units for 250 mcg | Units for 500 mcg | Units for 1 mg | Units for 2 mg |
|---|---|---|---|---|---|---|
| 1 mL | 10 mg/mL | 1 mg | 2.5 | 5 | 10 | 20 |
| 1.5 mL | 6.67 mg/mL | 666.7 mcg | 3.8 | 7.5 | 15 | 30 |
| 2 mL | 5 mg/mL | 500 mcg | 5 | 10 | 20 | 40 |
| 2.5 mL | 4 mg/mL | 400 mcg | 6.3 | 12.5 | 25 | 50 |
| 3 mL | 3.33 mg/mL | 333.3 mcg | 7.5 | 15 | 30 | 60 |
Highlighted row = the common default for this vial. Unit values are on a U-100 insulin syringe (100 units = 1 mL), rounded to 0.1 unit; read to the nearest graduation your syringe has.
How to reconstitute 10 mg PT-141
- Equilibrate. Let the sealed vial and the bacteriostatic water reach room temperature (about 15 to 20 minutes) to limit condensation and help the powder dissolve.
- Swab both stoppers. Wipe the rubber stopper of the peptide vial and of the water vial with a fresh alcohol swab and let them air-dry.
- Measure the water. Draw 2 mL of bacteriostatic water (or your chosen volume from the chart) with a sterile syringe.
- Add it down the vial wall. Insert the needle through the stopper at an angle and release the water slowly down the inside wall of the vial, not directly onto the powder.
- Swirl, do not shake. Gently swirl or roll the vial until the powder is fully dissolved and the solution is clear. Allow a few minutes; some peptides dissolve slowly.
- Label it. Write the date and the concentration (5 mg/mL at the default volume) on the vial.
- Refrigerate. Store the reconstituted vial at 2 to 8 °C, protected from light.
More detail: bacteriostatic vs sterile water and reading insulin syringes.
Storage after reconstitution
- Keep the reconstituted vial at 2 to 8 °C (refrigerator, not the door), protected from light.
- Lumera's product pages list 28 days at 2 to 8 °C in the original vial; follow the window on the lot's COA. Bacteriostatic water's benzyl alcohol limits microbial growth across repeated stopper punctures; sterile water does not.
- Do not refreeze the working vial. For longer holding, divide into aliquots once and freeze, avoiding repeated freeze-thaw cycles.
- Unopened lyophilized vials keep best frozen (-20 °C). See the peptide storage temperature guide.
Troubleshooting
The solution is cloudy
Give it time: let the vial stand in the fridge for 15 to 30 minutes and swirl gently again. If cloudiness, particles or a colour change persist after the powder has dissolved, do not use the solution for quantitative work; discard it.
Foam or bubbles
Usually caused by shaking or by streaming water onto the powder. Let the vial rest upright in the fridge until the foam settles, and next time add the water slowly down the vial wall and swirl instead of shaking.
Left out at room temperature overnight
Degradation speeds up at room temperature, and how much is lost varies by peptide. Return the vial to 2 to 8 °C, note the excursion on the label, and for work where exact concentration matters, prepare a fresh vial.
PT-141 10 mg
PT-141 10 mg: $50 CAD per vial. Certificate of Analysis available on request.
Bacteriostatic water: 3 mL $10 CAD or 10 mL $15 CAD.
View PT-141 10 mg Bacteriostatic water Peptide calculatorPT-141 reconstitution FAQ
How much bacteriostatic water do I add to 10 mg PT-141?
Most labs add 2 mL, which gives 5 mg/mL. Alternatives: 1 mL gives 10 mg/mL; 1.5 mL gives 6.67 mg/mL; 2.5 mL gives 4 mg/mL. The volume is a choice; what matters is recording the resulting concentration on the vial label.
How many units is 1 mg of PT-141 in a 2 mL mix?
At 5 mg/mL, 1 mg is in 20 units on a U-100 insulin syringe (0.2 mL). Units = amount / concentration x 100.
What concentration does 10 mg PT-141 make with 2 mL of water?
10 mg divided by 2 mL is 5 mg/mL, so each 10 units (0.1 mL) holds 500 mcg.
How long does reconstituted PT-141 last in the fridge?
Lumera's product pages list reconstituted solutions as stable for 28 days at 2 to 8 °C in the original vial, protected from light. Use within the window noted on the lot's COA and discard if the solution turns cloudy, changes colour or shows particles.
Should I shake the PT-141 vial to dissolve it?
No. Swirl or roll the vial gently and let it stand a few minutes. Shaking creates foam and can degrade peptides.
All reconstitution charts by peptide · Peptide calculator for custom volumes.
Research use only. This page is measurement arithmetic for preparing research solutions from a lyophilized vial. It is not a dosing guide. Lumera Labs supplies peptides as laboratory reference standards; they are not approved drugs and are not intended for therapeutic use.