How much BAC water should I add to my CJC-1295 DAC vial?

It depends on your vial size and the concentration you want to achieve. That's exactly why we recommend using the peptide calculator before you begin. A common approach is adding 1–2 mL of BAC water to a standard vial, but your specific setup may differ. Always calculate first so your measurements are accurate and consistent.

Why can't I just use regular sterile water instead of BAC water?

Regular sterile water doesn't contain a preservative, so once the vial is opened and the needle punctures the stopper, bacteria can enter. Bacteriostatic water contains a small amount of benzyl alcohol that inhibits bacterial growth, keeping your solution stable and safe for research use over multiple draws across several weeks.

What happens if I accidentally shake the vial instead of swirling it?

A brief accidental shake likely won't destroy the entire solution, but repeated or vigorous shaking can create foam and potentially degrade the peptide's structure over time. If you shook it briefly, let the vial rest for a few minutes until any bubbles settle, then check that the solution looks clear before proceeding.

How long does a reconstituted CJC-1295 DAC solution last in the fridge?

When stored correctly at 2–8°C, away from light, a reconstituted peptide solution is generally considered stable for several weeks. Always label your vial with the reconstitution date so you can track its age. If the solution ever looks cloudy or shows particles, it's best to discard it and start fresh rather than risk compromised research results.

How to Reconstitute CJC-1295 DAC Step by Step

What Does 'Reconstituting' Actually Mean?

Peptides like CJC-1295 DAC are shipped as a dry, freeze-dried powder. This keeps them stable during transit. Before the peptide can be used in a research setting, you need to turn that powder back into a liquid by adding sterile water. That process is called reconstitution. Think of it like dissolving a stock cube into broth — you're just bringing the ingredient back to its usable form.

The liquid you add is called bacteriostatic water, often shortened to BAC water. It contains a tiny amount of benzyl alcohol, which stops bacteria from growing in the solution. This matters because once you open a vial, you want it to stay clean and stable for weeks, not hours.

What You'll Need Before You Start

Your vial of CJC-1295 DAC (the powder)
A vial of bacteriostatic water (BAC water)
One or two insulin syringes (typically 1 mL)
Alcohol swabs
A clean, flat surface and good lighting

That's it. No complicated equipment required.

Step 1 — Warm the Vial Gently

Take your peptide vial out of the fridge or freezer and let it sit at room temperature for 10 to 15 minutes. This gentle warming helps the powder reconstitute more evenly. Don't rush this step by using heat — no microwaves, no hot water. Just patience. A cold vial can cause the liquid to behave strangely when you add it, so this little wait is worth it.

Step 2 — Figure Out Your Volumes First

Before you touch a syringe, visit our peptide calculator. This is the step most people skip — and then regret. The calculator tells you exactly how much BAC water to add to your specific vial size, and what volume to draw for any given amount of peptide. Get this right upfront and every step after becomes much easier. Write your numbers down if it helps.

Step 3 — Swab Everything

Use an alcohol swab to clean the rubber stopper on both your BAC water vial and your peptide vial. Let them air-dry for 10 seconds. Alcohol is only effective once it evaporates, so don't rush straight in with your needle. This step protects the integrity of your solution.

Step 4 — Draw the BAC Water

Insert your syringe into the BAC water vial and draw up the exact volume your calculator recommended. Pull the plunger slowly and steadily. If you see small bubbles, tap the syringe gently and push them out before proceeding. Accuracy here makes your whole solution more reliable.

Step 5 — Add the Water Slowly and Carefully

This is the most important step. Insert the needle into your peptide vial and aim the tip so the water runs down the inside wall of the glass, not directly onto the powder cake at the bottom. Why? Because blasting the powder with liquid can damage the peptide's delicate structure. Go slowly. Push the plunger gently, a little at a time. There's no rush here — slow is smooth, smooth is successful.

Step 6 — Swirl, Don't Shake

Once the water is in, you'll likely see the powder start to dissolve. Give the vial a gentle swirl between your palms. Do not shake it vigorously like a cocktail shaker. Shaking creates foam and can degrade the peptide. Swirl slowly and let gravity and time do the work. Within a minute or two, you should have a clear, colorless solution. If it stays cloudy, give it another gentle swirl and a moment to settle.

Step 7 — Check Your Solution

Hold the vial up to a light source and look at the liquid. It should be clear and particle-free. A faint color tint can occasionally be normal depending on the peptide, but visible floaties or a milky appearance are red flags. If something looks off, it's better to start fresh than to proceed.

Step 8 — Label and Store It Properly

Write today's date on the vial with a marker. A reconstituted peptide solution stored in the refrigerator (not the freezer) at around 2–8°C is typically considered stable for several weeks. Keep it away from light and don't let it freeze, as that can damage the solution. Treat it like a small, important science experiment — because that's exactly what it is.

A Quick Note on Research Use

This guide is written for educational and research purposes only. Nothing here constitutes medical advice. Always follow the protocols of your research institution and consult appropriate professionals.

How to Reconstitute CJC-1295 DAC: A Step-by-Step Guide