DualSeal (Double cap)

In December 2017, we introduced our newly developed double cap system "DualSeal" for moisture/oxygen sensitive products allowing you to keep them in good condition until the last drop. We will continuously increase our usage of DualSeal across our product portfolio.

Features of DualSeal

• Air-sensitive reagents can be safely dispensed without exposure to air
• Even after piercing the septum cap, the PTFE sheet on the blue cover cap provides sealing protection.
• Easy to dispose of caps and bottles separately

The blue cap has a convex structure on the inside.
By filling the space where air and moisture stay, the material is protected from moisture and oxygen even after piercing the septum cap with a needle.

The white septum cap has a wide septum surface for ease of use, and features two layers of rubber and a highly chemically resistant PTFE seal.
The septum cap body is made of polypropylene and contains a screw thread allowing for easy removal from the bottle. The septum cap is closed with high torque to ensure an airtight seal.

1. Clamp and secure the reagent bottle before opening.
2. Carefully unscrew the blue outer cap only. Place the cap near the bottle while in use.
3. To prevent air from entering the container, insert a needle with a balloon filled with an inert gas such as argon or nitrogen. Then insert a syringe needle through the septum surface of the white cap.
   
4. Fill the syringe with the required amount of liquid.
5. Remove the syringe, inject the liquid into your reaction vessel and safely dispose of the needle.
6. Take the blue cap and screw it tightly back in place.
7. Unclamp the DualSeal bottle and place it in its proper storage location.

• Do not dispose of the inlaid PTFE sheet! Keep it as it is during use! This PTFE sheet acts as a second layer air seal.

• Do not place anything on the septum cap! This will significantly reduce seal quality.

• Repeated use can lead to increasing the number of holes or increasing the size of existing holes and will over time lead to an increase in air leakage. To prevent deterioration of the septum, reduce the number of injections as much as possible, or purchase a smaller bottle size.

• In the case of halogenated solvent solutions such as dichloromethane, we recommend a minimum number of injections because the punctured area of septum butyl rubber will be invaded by the vapor of the halogenated solvent, etc. Also, after removing the syringe needle, please be careful of contamination, as the solution on the needle tip may dissolve the butyl rubber.
• Please note that if you remove the needle without withdrawing the reagent from inside the needle, the liquid may adhere to the septum and cause it to deteriorate.