A Beginner’s Guide to Research Compound Reconstitution

Reconstitution is the single most error-prone step in research compound work. Get it wrong and you compromise dosing accuracy, research compound stability, or both. This guide walks through reconstitution from scratch for Australian researchers — no assumed background.

What “reconstitution” actually means

Research compounds ship as a lyophilised (freeze-dried) white powder in a sealed glass vial. Reconstitution is the process of dissolving that powder into a sterile solvent — almost always bacteriostatic water (BAC water) — so the research compound can be drawn into an insulin syringe in precise volumes.

What you'll need

• The sealed research compound vial
• A vial of bacteriostatic water (0.9% benzyl alcohol)
• A 3 mL or 5 mL drawing syringe (for the water)
• Alcohol swabs
• An insulin syringe (U-100, 0.5 mL or 1 mL) for dosing
• A calculator

Step-by-step

1. Bring the research compound to room temperature. Take the vial out of the fridge and let it sit for 15–20 minutes. Cold glass plus warm solvent risks cracking and condensation.
2. Swab both vials. Wipe the rubber stopper of the BAC water vial and the research compound vial with an alcohol swab. Let dry.
3. Draw the BAC water. Pull your chosen volume into the syringe (see the math section below). 2 mL is the most common starting volume for a 10 mg vial.
4. Inject slowly down the side of the research compound vial. Aim the needle so the water runs down the inside wall, not directly onto the powder. Direct streams can denature the research compound.
5. Swirl gently — do not shake. Shaking introduces foam and mechanical stress. Roll the vial between your palms until the powder fully dissolves. Solution should be clear.
6. Refrigerate. Reconstituted research compound goes in the fridge immediately. Keep upright. Use within the window specified by your supplier (typically 2–4 weeks for most research compounds; less for fragile ones like tesamorelin).

The math, simplified

Three numbers matter: mg in the vial, mL of BAC water you added, and units on your insulin syringe.

Concentration (mg/mL) = mg ÷ mL.

An insulin syringe has 100 units per mL. So 1 unit = 0.01 mL.

Worked example. A 10 mg vial reconstituted with 2 mL of BAC water gives 5 mg/mL. To draw 250 mcg: that's 0.25 mg ÷ 5 mg/mL = 0.05 mL = 5 units on the insulin syringe.

We also publish a live reconstitution calculator if you'd rather not do the arithmetic by hand.

Common mistakes

• Shaking instead of swirling. Mechanical stress fragments research compound bonds. Always swirl.
• Using sterile water (not BAC). Sterile water has no preservative — solutions go off in days, not weeks.
• Storing at room temperature. Reconstituted research compound degrades rapidly outside the fridge. Always refrigerate.
• Reusing needles. Cross-contamination ruins the vial. Always a fresh needle per draw.

Storage after reconstitution

Reconstituted research compound is stable in the fridge for 2–4 weeks for most molecules. Some fragile research compounds (tesamorelin, sermorelin, CJC-1295) are closer to 1–2 weeks. For full storage detail, see our storage and handling guide.