Guide
Opening your peptide vial
Two cap types ship with research peptides. Identify yours first, then follow the steps.
Flip-off cap
Plastic cap with a triangle indent
- 1Look at the top of the cap — if you see a small raised triangle (▲) or notch, that's a flip-tab.
- 2Place your thumbnail under the triangle and lift firmly upward. The plastic tab snaps off.
- 3A thin aluminum disk stays behind. Push the disk sideways with your thumb until it peels away.
- 4Expose the rubber stopper. Wipe with an alcohol swab and let dry for 10 seconds before piercing.
⚠ Don't pry with a knife — slipping ruins the rubber stopper and contaminates the vial.
Twist-off cap
Threaded plastic cap, no indent
- 1If the cap is smooth and has no triangle, grip it firmly and twist counter-clockwise — it unscrews by hand.
- 2Some vials have a slight 'click' as the plastic tamper-seal breaks. That's normal.
- 3Set the cap aside (you can re-cap between draws to keep the stopper clean).
- 4Swab the rubber stopper with isopropyl alcohol before inserting the needle.
⚠ If the cap won't budge, it's likely a flip-top — look again for the triangle tab.
After the cap is off
- 1Swab
Alcohol-swab the rubber stopper. Air-dry 10 sec — don't blow on it.
- 2Inject BAC water slowly
Aim the needle at the inside wall, not directly at the powder. Slow stream prevents foaming.
- 3Swirl, don't shake
Gently swirl until the powder fully dissolves. Shaking can denature the peptide.